Kovalenko IA, RоіtbergYA. On Green’s function of a general elliptical boundary value problem with pseudodifferential boundary conditions . Ukr. Mat. Zhurn. [Internet]. 1971Oct.26 [cited 2024Nov.24];23(6):772-7. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/8625