KuzA. M., and PtashnikB. I. “A Problem With Condition Containing an Integral Term for a Parabolic-Hyperbolic Equation”. Ukrains’kyi Matematychnyi Zhurnal 67, no. 5 (May 25, 2015): 635-644. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2011.