Machine assisted proofs in the theory of monadsAltenkirch, Thorsten; Chapman, James; Uustalu, Tarmo21st Nordic Workshop on Programming Theory : NWPT 2009 : Lyngby, Denmark, 14-16 October 2009 : proceedings2009 / p. 83-85 https://jmchapman.io/papers/Assisted_Monads.pdf

Monads need not be endofunctorsAltenkirch, Thorsten; Chapman, James; Uustalu, TarmoLogical methods in computer science2015 / p. 1-40 http://dx.doi.org/10.2168/LMCS-11(1:3)2015

Normalization by evaluation for lambda 2Altenkirch, Thorsten; Uustalu, TarmoFunctional and Logic Programming : 7th International Symposium, FLOPS 2004 : Nara, Japan, April 7-9, 2004 : proceedings2004 / p. [260]-275

Relative monads formalisedAltenkirch, Thorsten; Chapman, James; Uustalu, TarmoJournal of formalized reasoning2014 / p. 1-43