ECKHARDT, Caleb. A noncommutative Gauss map. Mathematica Scandinavica, Berkeley, CA, United States, v. 108, n. 2, p. 233–250, 2011. DOI: 10.7146/math.scand.a-15169. Disponível em: https://journals.msp.org/mscand/article/view/528. Acesso em: 24 jul. 2026.