MitropolskiyY. A., KhomaG. P. and Tsynalko P. V. (1997) “A periodic problem for the inhomogeneous equation of string oscillations”, Ukrains’kyi Matematychnyi Zhurnal, 49(4), pp. 558–565. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5031 (Accessed: 24November2024).