1. Composite cotriples and derived functors;Barr,1969
2. Toposes, triples and theories;Barr;Repr. Theory Appl. Categ.,2005
3. J. Beck, Triples, algebras and cohomology, PhD thesis, Columbia University, 1967
4. Triples, algebras and cohomology;Beck;Repr. Theory Appl. Categ.,2003
5. Distributive laws;Beck,1969