BUSEMANN, Herbert. Remark on "Planes with analogues to Eucledian angular bisectors". MATHEMATICA SCANDINAVICA, [S. l.], v. 38, p. 81–82, 1976. DOI: 10.7146/math.scand.a-11618. Disponível em: https://tidsskrift.dk/math/article/view/11618. Acesso em: 14 aug. 2026.