Assanova, A. T., E. A. Bakirova, and Zh. M. Kadirbayeva. 2017. “On the Unique Solvability of a nonlocal boundary-Value Problem for Systems of Loaded Hyperbolic Equations With impulsive actions”. Ukrains’kyi Matematychnyi Zhurnal 69 (8), 1011-29. https://umj.imath.kiev.ua/index.php/umj/article/view/1755.