Assanova, A. T., and A. B. Tleulessova. 2019. “Nonlocal Problem for а System of Partial Differential Equations of Higher Order With Pulsed Actions”. Ukrains’kyi Matematychnyi Zhurnal 71 (12), 1587-1606. https://umj.imath.kiev.ua/index.php/umj/article/view/712.