Selection out of more than 600 studies composed by
Vitaly Semenovich Kovalenko
(Russia, 23.5.1947 - 5.3.2014)
He is also an International Master in Chess composition.
See EG196 for the in memoriam article by Yuri Bazlov.
Some more information on ChessComposersBlogspot
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(All his studies, more exact dates, possible corrections or cooks and exact details about sources can be found in the
Harold van der Heijden database V (31-12-2015) a collection with over 85.000 studies)