Gorbachuk VM. On the uniqueness of solutions of the Dirichlet and Neumann problems for an elliptic second-order differential equation on a semiaxis. Ukr. Mat. Zhurn. [Internet]. 1994Nov.25 [cited 2024Jun.2];46(11):1564–1567. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5596