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://www.mscand.dk/article/view/10828. Acesso em: 29 apr. 2024.