RYS, P.; ZDRÁHAL, T. Implicit function in the calculus infinitesimalis. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 3, p. 227–232, 2003. Disponível em: https://studmath.uken.krakow.pl/article/view/13493. Acesso em: 30 oct. 2026.