Olijnyk, A. O. “On a Solution of a Boundary-Value Problem for a Hyperbolic Equation on a Disk With Random Initial Conditions”. Ukrains’kyi Matematychnyi Zhurnal 52, no. 3 (March 25, 2000): 409–415. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/4431.