HRACH, K. Two problems solved with MS-Excel. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 3, p. 73–76, 2003. Disponível em: https://studmath.uken.krakow.pl/article/view/13470. Acesso em: 30 oct. 2026.