“EQUIVALENCE OF THE FREDHOLM SOLVABILITY CONDITION FOR THE NEUMANN PROBLEM TO THE COMPLEMENTARITY CONDITION”. ҚазҰУ Хабаршысы. Математика, механика, информатика сериясы 111, no. 3 (October 9, 2021): 39–51. Accessed July 13, 2026. https://bm.kaznu.kz/index.php/kaznu/article/view/947.