In memory of Slav Nickolaevich Olekhnik
I. A. Vinogradova, O. B. Lupanov, I. I. Mel'nikov, M. K. Potapov, V. A. Sadovnichii, I. N. Sergeev

This publication is cited in the following articles:

1. “Pamyati Olega Borisovicha Lupanova (1932–2006)”, Diskretn. analiz i issled. oper., ser. 1, ser. 1, 14:1 (2007), 3–20