ESSEEN, C.- gustav. A note on Fourier-Stieltjes transforms and absolutely continuous functions. MATHEMATICA SCANDINAVICA, [S. l.], v. 2, p. 153–157, 1954. DOI: 10.7146/math.scand.a-10403. Disponível em: https://www.mscand.dk/article/view/10403. Acesso em: 2 may. 2024.