GEDA, Gábor. Various systems in a single mathematical model. Teaching Mathematics and Computer Science, [S. l.], v. 6, n. 1, p. 1–13, 2008. DOI: 10.5485/TMCS.2008.0164. Disponível em: https://ojs.lib.unideb.hu/tmcs/article/view/14810. Acesso em: 20 oct. 2024.