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В. В. Карачик, “Решение задачи Дирихле для полигармонического уравнения в шаре”, Матем. тр., 24:2 (2021), 46–64
Karachik V., “Dirichlet and Neumann Boundary Value Problems For the Polyharmonic Equation in the Unit Ball”, Mathematics, 9:16 (2021), 1907
В. В. Карачик, “Функция Грина задачи Дирихле для $3$-гармонического уравнения в шаре”, Матем. заметки, 107:1 (2020), 87–105 ; V. V. Karachik, “The Green Function of the Dirichlet Problem for the Triharmonic Equation in the Ball”, Math. Notes, 107:1 (2020), 105–120
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Oleg D. Algazin, “EXACT SOLUTIONS TO THE BOUNDARY-VALUE PROBLEMS FOR THE HELMHOLTZ EQUATION IN A LAYER WITH POLYNOMIALS IN THE RIGHT-HAND SIDES OF THE EQUATION AND OF THE BOUNDARY CONDITIONS”, Bulletin of the MSRU (Physics and Mathematics), 2020, no. 1, 6
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V. V. Karachik, “Neumann Type Problems for the Polyharmonic Equation in Ball”, J Math Sci, 249:6 (2020), 974
V. Karachik, “Green's function of Dirichlet problem for biharmonic equation in the ball”, Complex Var. Elliptic Equ., 64:9 (2019), 1500–1521