FIGURSKI, A. A theorem on divergence of Fourier series. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 5, p. 45–50, 2006. Disponível em: https://studmath.uken.krakow.pl/article/view/13291. Acesso em: 31 oct. 2026.