POGODA, Z. Professor Andrzej Zajtz a scolar and educator on the 70th birthday anniversary. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 4, p. 5–8, 2004. Disponível em: https://studmath.uken.krakow.pl/article/view/13303. Acesso em: 31 oct. 2026.