KOCK, A.; KRISTENSEN, L.; MADSEN, I. Cochain Functors for General Cohomology Theories II. MATHEMATICA SCANDINAVICA, [S. l.], v. 20, p. 151–176, 1967. DOI: 10.7146/math.scand.a-10828. Disponível em: https://tidsskrift.dk/math/article/view/10828. Acesso em: 14 aug. 2026.