CABRAS, A.; JANYŠKA, J.; KOLÁŘ, I. Functorial prolongations of some functional bundles. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 4, p. 17–30, 2004. Disponível em: https://studmath.uken.krakow.pl/article/view/13305. Acesso em: 31 oct. 2026.