ROMANYUK, A. S.; SERDYUK, A. S.; STEPANETS, O. I. The second school “Fourier series. Theory and Applications”. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 11, p. 1584, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5161. Acesso em: 5 dec. 2025.