SAH, Chih-han. Scissors congruences, I. The Gauss-Bonnet map corrections. Mathematica Scandinavica, Berkeley, CA, United States, v. 53, p. 62–62, 1983. DOI: 10.7146/math.scand.a-12016. Disponível em: https://journals.msp.org/mscand/article/view/1654. Acesso em: 25 jul. 2026.