KWAPISZ, Jaroslaw. Quasi-symmetry without ratios. MATHEMATICA SCANDINAVICA, [S. l.], v. 125, n. 1, p. 5–12, 2019. DOI: 10.7146/math.scand.a-112190. Disponível em: https://tidsskrift.dk/math/article/view/112190. Acesso em: 14 aug. 2026.