KÉZI, Csaba. An Economical Mathematics Model. International Journal of Engineering and Management Sciences, [S. l.], v. 3, n. 5, p. 39–44, 2018. DOI: 10.21791/IJEMS.2018.5.5. Disponível em: https://ojs.lib.unideb.hu/IJEMS/article/view/5109.. Acesso em: 6 may. 2024.