BilalovB. T., IsmailovM. I., and KasumovZ. A. “On Solvability of One Class of Third Order Differential Equations”. Ukrains’kyi Matematychnyi Zhurnal 73, no. 3 (March 22, 2021): 314 - 328. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/195.