DIRAC, Gabriel. On Arbitrarily Traceable Graphs. MATHEMATICA SCANDINAVICA, [S. l.], v. 31, p. 319–378, 1972. DOI: 10.7146/math.scand.a-11439. Disponível em: https://tidsskrift.dk/math/article/view/11439. Acesso em: 14 aug. 2026.