ECKHARDT, C. A noncommutative Gauss map. MATHEMATICA SCANDINAVICA, [S. l.], v. 108, n. 2, p. 233–250, 2011. DOI: 10.7146/math.scand.a-15169. Disponível em: https://www.mscand.dk/article/view/15169. Acesso em: 11 apr. 2025.