CIESLAK, Waldemar; ZAJAC, Józef. The rosettes. Mathematica Scandinavica, Berkeley, CA, United States, v. 58, p. 114–118, 1986. DOI: 10.7146/math.scand.a-12133. Disponível em: https://journals.msp.org/mscand/article/view/1497. Acesso em: 25 jul. 2026.