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- V. V. Karachik, “Green’s Function of the Riquier–Neumann Problem for the Polyharmonic Equation in the Unit Ball”, Comput. Math. and Math. Phys., 64, № 5, 2024, 1015

- V. V Karachik, “GREEN’S FUNCTION FOR THE RIEMANN–NEUMANN PROBLEM FOR A POLYHARMONIC EQUATION IN THE UNIT SPHERE”, Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, 64, № 5, 2024, 791
