SCHMIDT, Asmus L. Farey Triangles and Farey Quadrangels in the Complex Plane. Mathematica Scandinavica, Berkeley, CA, United States, v. 21, p. 241–295, 1967. DOI: 10.7146/math.scand.a-10863. Disponível em: https://journals.msp.org/mscand/article/view/2462. Acesso em: 25 jul. 2026.