APA (7th ed.) Citation

Feshchenko, I. S., Фещенко, И. С., & Фещенко, И. С. (2011). On closeness of the sum of n subspaces of a Hilbert space. Institute of Mathematics, NAS of Ukraine.

Chicago Style (17th ed.) Citation

Feshchenko, I. S., И. С Фещенко, and И. С Фещенко. On Closeness of the Sum of N Subspaces of a Hilbert Space. Institute of Mathematics, NAS of Ukraine, 2011.

MLA (8th ed.) Citation

Feshchenko, I. S., et al. On Closeness of the Sum of N Subspaces of a Hilbert Space. Institute of Mathematics, NAS of Ukraine, 2011.

Warning: These citations may not always be 100% accurate.