Mikhailets VA, Murach AA. Regular elliptic boundary-value problem for a homogeneous equation in a two-sided improved scale of spaces. Ukr. Mat. Zhurn. [Internet]. 2006Nov.25 [cited 2024Apr.26];58(11):1536–1555. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3553