[1]
I. A. Kovalenko and Rоіtberg Y. A., “On Green’s function of a general elliptical boundary value problem with pseudodifferential boundary conditions ”, Ukr. Mat. Zhurn., vol. 23, no. 6, pp. 772–777, Oct. 1971, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/8625