RomanyukA. S., SerdyukA. S. and StepanetsO. I. (1997) “The second school ‘Fourier series. Theory and Applications’”, Ukrains’kyi Matematychnyi Zhurnal, 49(11), p. 1584. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5161 (Accessed: 1September2024).