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Zhuravlev VP, Fomin NP, Zabrodskiy PN. Conditions of solvability and submission of solutions of equations with operator matrix in banach spaces. Ukr. Mat. Zhurn. [Internet]. 2023 Jul. 19 [cited 2025 Apr. 7];71(4):471-85. Available from:
https://umj.imath.kiev.ua/index.php/umj/article/view/305