Assanova, A. T., and A. B. Tleulessova. “Nonlocal Problem for а System of Partial Differential Equations of Higher Order With Pulsed Actions”. Ukrains’kyi Matematychnyi Zhurnal 71, no. 12 (December 25, 2019): 1587–1606. Accessed April 7, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/712.