2 citations to https://www.mathnet.ru/eng/emj227

1. M. Sadybekov, B. Derbissaly, “On Green's function of Cauchy-Dirichlet problem for hyperbolic equation in a quarter plane”, Bound. Value Probl., 2021:1 (2021), 69          
2. V. V. Karachik, A. M. Sarsenbi, B. K. Turmetov, “On the solvability of the main boundary value problems for a nonlocal Poisson equation”, Turk. J. Math., 43:3 (2019), 1604–1625