\def\cprime{$'$}
\begin{thebibliography}{10}

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Peter Aczel.
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\newblock Free algebras and automata realizations in the language of
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\newblock {\em Comment. Math. Univ. Carolinae}, 15:589--602, 1974.

\bibitem{Ahrens2016}
Benedikt Ahrens.
\newblock Modules over relative monads for syntax and semantics.
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\bibitem{AM2016}
Benedikt Ahrens and Ralph Matthes.
\newblock Heterogeneous substitution systems revisited.
\newblock {\em https://arxiv.org/abs/1601.04299}, 2016.

\bibitem{AMM2016}
Benedikt Ahrens, Ralph Matthes, and Anders Mörtberg.
\newblock From signatures to monads in unimath.
\newblock {\em https://arxiv.org/abs/1612.00693}, 2016.

\bibitem{AMM2017}
Benedikt Ahrens, Ralph Matthes, and Anders Mörtberg.
\newblock Monads from multi-sorted binding signatures.
\newblock {\em http://benedikt-ahrens.de/multisorted.pdf}, 2017.

\bibitem{ACU}
Thorsten Altenkirch, James Chapman, and Tarmo Uustalu.
\newblock Monads need not be endofunctors.
\newblock In {\em Foundations of software science and computational
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\bibitem{ACU2}
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\newblock Monads need not be endofunctors.
\newblock {\em Logical Methods in Computer Science}, 11(1:3):1--40, 2015.

\bibitem{Barendregt}
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\newblock {\em The lambda calculus}, volume 103 of {\em Studies in Logic and
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\newblock North-Holland Publishing Co., Amsterdam, revised edition, 1984.
\newblock Its syntax and semantics.

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\newblock Coequalizers and free triples.
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\bibitem{Bourbaki.Sets}
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\newblock {\em Theory of sets}.
\newblock Elements of Mathematics (Berlin). Springer-Verlag, Berlin, 2004.
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\newblock Generalised algebraic theories and contextual categories.
\newblock {\em Ph.D. Thesis, Oxford University}, 1978.
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\newblock Generalised algebraic theories and contextual categories.
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\bibitem{Church1932}
Alonzo Church.
\newblock A set of postulates for the foundation of logic.
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\newblock Grundlagen der {K}ombinatorischen {L}ogik.
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Marcelo Fiore, Gordon Plotkin, and Daniele Turi.
\newblock Abstract syntax and variable binding (extended abstract) ({W}arning:
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\newblock In {\em 14th {S}ymposium on {L}ogic in {C}omputer {S}cience
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P.~Gabriel and M.~Zisman.
\newblock {\em Calculus of fractions and homotopy theory}.
\newblock Ergebnisse der Mathematik und ihrer Grenzgebiete, Band 35.
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Richard Garner.
\newblock Combinatorial structure of type dependency.
\newblock {\em J. Pure Appl. Algebra}, 219(6):1885--1914, 2015.

\bibitem{HM2007}
Andr{\'e} Hirschowitz and Marco Maggesi.
\newblock Modules over monads and linearity.
\newblock In {\em Logic, language, information and computation}, volume 4576 of
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\bibitem{HM2008}
Andr{\'e} Hirschowitz and Marco Maggesi.
\newblock Higher order theories.
\newblock {\em \url{http://arxiv.org/abs/0704.2900}}, 2010.

\bibitem{HM2010}
Andr{\'e} Hirschowitz and Marco Maggesi.
\newblock Modules over monads and initial semantics.
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\bibitem{HM2012}
Andr{\'e} Hirschowitz and Marco Maggesi.
\newblock Nested abstract syntax in {C}oq.
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\bibitem{Hofmann}
Martin Hofmann.
\newblock Syntax and semantics of dependent types.
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\bibitem{KLV1}
Chris Kapulkin, Peter~LeFanu Lumsdaine, and Vladimir Voevodsky.
\newblock The simplicial model of univalent foundations.
\newblock {\em Available at \url{http://arxiv.org/abs/1211.2851}}, 2012, 2014.

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\newblock Every standard construction is induced by a pair of adjoint functors.
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\bibitem{Lawvere}
F.~William Lawvere.
\newblock Functorial semantics of algebraic theories and some algebraic
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\newblock {\em Repr. Theory Appl. Categ.}, (5):1--121, 2004.
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\newblock {\em Categories for the working mathematician}, volume~5 of {\em
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\newblock Springer-Verlag, 1971.

\bibitem{MLTT79}
Per Martin-L{\"o}f.
\newblock Constructive mathematics and computer programming.
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\bibitem{MatthesUustalu}
Ralph Matthes and Tarmo Uustalu.
\newblock Substitution in non-wellfounded syntax with variable binding.
\newblock {\em Theoret. Comput. Sci.}, 327(1-2):155--174, 2004.

\bibitem{Moggi}
Eugenio Moggi.
\newblock Notions of computation and monads.
\newblock {\em Inform. and Comput.}, 93(1):55--92, 1991.
\newblock Selections from the 1989 IEEE Symposium on Logic in Computer Science.

\bibitem{Pitts}
Andrew~M. Pitts.
\newblock {\em Nominal sets}, volume~57 of {\em Cambridge Tracts in Theoretical
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\newblock Cambridge University Press, Cambridge, 2013.
\newblock Names and symmetry in computer science.

\bibitem{Schonfinkel1924}
Moses Schönfinkel.
\newblock Über die bausteine der mathematischen logik.
\newblock {\em Math. Ann.}, 92:305 -- 316; Jbuch 50, 23, 1924.

\bibitem{2002Selinger}
Peter Selinger.
\newblock The lambda calculus is algebraic.
\newblock {\em J. Funct. Programming}, 12(6):549--566, 2002.

\bibitem{Streicher}
Thomas Streicher.
\newblock {\em Semantics of type theory}.
\newblock Progress in Theoretical Computer Science. Birkh\"auser Boston Inc.,
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\newblock Correctness, completeness and independence results, With a foreword
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\bibitem{FtoG}
Jean van Heijenoort.
\newblock {\em From {F}rege to {G}\"odel. {A} source book in mathematical
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\newblock Harvard University Press, Cambridge, Mass., 1967.

\bibitem{NTS}
Vladimir Voevodsky.
\newblock Notes on type systems.
\newblock 2009--2012.
\newblock \url{https://github.com/vladimirias/old_notes_on_type_systems}.

\bibitem{CMUtalk}
Vladimir Voevodsky.
\newblock The equivalence axiom and univalent models of type theory.
\newblock {\em \url{http://arxiv.org/abs/1402.5556}}, pages 1--11, February 4,
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\newblock \url{http://arxiv.org/abs/1402.5556}.

\bibitem{Bsystems}
Vladimir Voevodsky.
\newblock B-systems.
\newblock {\em arXiv 1410.5389, submitted}, pages 1--17, 2014.

\bibitem{Cfromauniverse}
Vladimir Voevodsky.
\newblock A {C}-system defined by a universe category.
\newblock {\em Theory Appl. Categ.}, 30(37):1181--1215, 2015.
\newblock \url{http://www.tac.mta.ca/tac/volumes/30/37/30-37.pdf}.

\bibitem{UniMath2015}
Vladimir Voevodsky.
\newblock An experimental library of formalized mathematics based on the
  univalent foundations.
\newblock {\em Math. Structures Comput. Sci.}, 25(5):1278--1294, 2015.

\bibitem{LandC}
Vladimir Voevodsky.
\newblock Lawvere theories and {C-systems}.
\newblock {\em arXiv 1512.08104}, pages 1--15, 2015.
\newblock \url{http://arxiv.org/abs/1512.08104}, under review in Proceedings of
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\bibitem{fromunivwithpaths}
Vladimir Voevodsky.
\newblock Martin-{L}of identity types in the {C}-systems defined by a universe
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\newblock {\em arXiv 1505.06446}, pages 1--51, 2015.
\newblock \url{http://arxiv.org/abs/1505.06446}, under review in Publication
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\bibitem{LandJf}
Vladimir Voevodsky.
\newblock Lawvere theories and {Jf}-relative monads.
\newblock {\em arXiv 1601.02158}, pages 1--21, January 9, 2016.
\newblock \url{http://arxiv.org/abs/1601.02158}.

\bibitem{fromunivwithPiI}
Vladimir Voevodsky.
\newblock Products of families of types and {$(\Pi,\lambda)$}-structures on
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\newblock {\em Theory Appl. Categ.}, 31:Paper No. 36, 1044--1094, 2016.
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\bibitem{Csubsystems}
Vladimir Voevodsky.
\newblock Subsystems and regular quotients of {C}-systems.
\newblock In {\em A panorama of mathematics: pure and applied}, volume 658 of
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\newblock prepublication version in \url{http://arxiv.org/abs/1406.7413}.

\bibitem{fromunivwithPiII}
Vladimir Voevodsky.
\newblock The {$(\Pi, \lambda)$}-structures on the {C}-systems defined by
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\newblock {\em Theory Appl. Categ.}, 32:Paper No. 4, 113--121, 2017.
\newblock \url{http://www.tac.mta.ca/tac/volumes/32/4/32-04.pdf}.

\bibitem{UniMath}
Vladimir Voevodsky, Benedikt Ahrens, Daniel Grayson, et~al.
\newblock {\em UniMath} - a library of formalized mathematics.
\newblock Available at \url{https://github.com/UniMath}.

\bibitem{Zsido}
Julianna Zsido.
\newblock {\em {Typed Abstract Syntax}}.
\newblock Theses, {Universit{\'e} Nice Sophia Antipolis}, June 2010.

\end{thebibliography}