SAARIMÄKI, Mikko; SORJONEN, Pekka. Valued Groups. MATHEMATICA SCANDINAVICA, [S. l.], v. 70, p. 265–280, 1992. DOI: 10.7146/math.scand.a-12401. Disponível em: https://tidsskrift.dk/math/article/view/12401. Acesso em: 14 aug. 2026.