“Parabolic Boundary-Value Problems of Mathematical Physics in a Piecewise Homogeneous Wedge-Shaped Hollow Cylinder”. Neliniini Kolyvannya 26, no. 3 (September 29, 2023): 350–362. Accessed January 22, 2026. https://twinhead.imath.kiev.ua/index.php/nosc/article/view/1109.