KOCK, A.; REYES, G. E. Models for synthetic integration theory. MATHEMATICA SCANDINAVICA, [S. l.], v. 48, p. 145–152, 1981. DOI: 10.7146/math.scand.a-11907. Disponível em: https://www.mscand.dk/article/view/11907. Acesso em: 6 may. 2024.