Rutkauskas, Stasys. “On the Dirichlet Problem to Elliptic Equation, the Order of Which Degenerates at the Axis of a Cylinder”. Mathematical Modelling and Analysis 22, no. 5 (September 21, 2017): 717-732. Accessed December 29, 2024. https://jcem.vgtu.lt/index.php/MMA/article/view/923.