Horbachuk, M. L., & Horbachuk, V. M. (2016). The direct and inverse theorems of the approximation theory for solutions of differential equations in a Banach space.
Chicago Style (17th ed.) CitationHorbachuk, M. L., and V. M. Horbachuk. The Direct and Inverse Theorems of the Approximation Theory for Solutions of Differential Equations in a Banach Space. 2016.
MLA (8th ed.) CitationHorbachuk, M. L., and V. M. Horbachuk. The Direct and Inverse Theorems of the Approximation Theory for Solutions of Differential Equations in a Banach Space. 2016.
Warning: These citations may not always be 100% accurate.