Wiśniewski, Damian. “The Behaviour of Weak Solutions of Boundary Value Problems for Linear Elliptic Second Order Equations in Unbounded Cone-Like Domains”. Annales Mathematicae Silesianae 30 (September 23, 2016): 203-217. Accessed September 26, 2024. https://journals.us.edu.pl/index.php/AMSIL/article/view/13965.