Bazalii BV, Degtyarev SP. On one boundary-value problem for a strongly degenerate second-order elliptic equation in an angular domain. Ukr. Mat. Zhurn. [Internet]. 2007Jul.25 [cited 2024Nov.22];59(7):867–883. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3352