ESSEEN, Carl-gustav. A note on Fourier-Stieltjes transforms and absolutely continuous functions. Mathematica Scandinavica, Berkeley, CA, United States, v. 2, p. 153–157, 1954. DOI: 10.7146/math.scand.a-10403. Disponível em: https://journals.msp.org/mscand/article/view/2919. Acesso em: 25 jul. 2026.