Wiśniewski, Damian. 2016. “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):203-17. https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/13965.