KRECH, I. Awaiting the series of colors - stochastic graph as a means of mathematical treatment and argumentation. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 3, p. 119–124, 2003. Disponível em: https://studmath.uken.krakow.pl/article/view/13477. Acesso em: 30 oct. 2026.