SAARIMÄKI, Mikko; SORJONEN, Pekka. Valued Groups. Mathematica Scandinavica, Berkeley, CA, United States, v. 70, p. 265–280, 1992. DOI: 10.7146/math.scand.a-12401. Disponível em: https://journals.msp.org/mscand/article/view/1247. Acesso em: 24 jul. 2026.