MUNKHOLM, Hans Jorgen. Borsuk-Ulam Type Theorems for Proper $Z_p$-Actions on (Mod $p$ Homology) $n$-Spheres. Mathematica Scandinavica, Berkeley, CA, United States, v. 24, p. 167–185, 1969. DOI: 10.7146/math.scand.a-10928. Disponível em: https://journals.msp.org/mscand/article/view/2372. Acesso em: 25 jul. 2026.