PIKE, David A.; SANAEI, Asiyeh; SHALABY, Nabil. Pseudo-Skolem sequences and graph Skolem labelling. Mathematica Scandinavica, Berkeley, CA, United States, v. 120, n. 1, p. 17–38, 2017. DOI: 10.7146/math.scand.a-25502. Disponível em: https://journals.msp.org/mscand/article/view/335. Acesso em: 24 jul. 2026.