Gorbachuk, M., & Gorbachuk, V. (1999). Direct and inverse theorems on approximation of solution of operator equation. Нелинейные граничные задачи.
Chicago Style (17th ed.) CitationGorbachuk, M.L, and V.I Gorbachuk. "Direct and Inverse Theorems on Approximation of Solution of Operator Equation." Нелинейные граничные задачи 1999.
MLA (8th ed.) CitationGorbachuk, M.L, and V.I Gorbachuk. "Direct and Inverse Theorems on Approximation of Solution of Operator Equation." Нелинейные граничные задачи, 1999.
Warning: These citations may not always be 100% accurate.