1.
Nizhnik LP, Taraborkin LA. On self-conjugate operators generated nonhomogeneous elliptical problems with discontinuity boundary conditions and conditions of conjugacy. Ukr. Mat. Zhurn. [Internet]. 1991 Feb. 28 [cited 2026 Jan. 12];43(3):374-81. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/9618