Team-building technique as an effective method of building a team and creating a favorable psychological climate in the student group von O. S. Kovalchuk

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Study of the Ukrainian Source and Archeography history of the Romanticism period in the pages of Ukrainian Diaspora periodicals von O. O. Kovalchuk

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Axiological aspect of genre investigation von O. H. Kovalchuk

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I.F. Chernikov's 75 Birthday von O. O. Kovalchuk

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Works, Published by Doctor of History Chernikov Ihor Fedorovych (1990–2005) von O. O. Kovalchuk

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Structural and functional changes of the historical works of Romanticism period source base von O. O. Kovalchuk

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Promising developments of domestic legal science on legal awareness von O. M. Kovalchuk

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About one three step method with memory for solving system of nonlinear equations von O. V. Kovalchuk

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New Data on Morphology, Taxonomy and Palaeoecology of Bony Fishes from the Middle-Late Miocene of Mykhailivka locality (Southern Ukraine) von O. M. Kovalchuk

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A New Extinct Species of Pikeperch, Sander svetovidovi (Teleostei, Percidae), from the Late Miocene of Southern Ukraine von O. M. Kovalchuk

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The First Appearance of Hucho (Salmonidae) in the Fossil Record of Eastern Europe von O. M. Kovalchuk

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A Bony Fishes from the Late Miocene and Pliocene Strata of Popovo Locality (Ukraine): Taxonomic Changes and Their Palaeoecological Explanation von O. M. Kovalchuk

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New Extinct Carp Fisli Taxa (Teleostei, Cyprinidae) from die Late Neogene of Southeastern Europe von O. M. Kovalchuk

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Fishes in the Comparative Osteological Collection of the National Museum of Natural History NAS of Ukraine von O. M. Kovalchuk

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A New Fossil Perca Fish (Teleostei, Percidae) from the Neopleistocenian Sediments of Southern Ukraine von O. M. Kovalchuk

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The Find of the Skull of Ursus arctos (Carnivora, Ursidae) in the Alluvium of the Sula River von O. M. Kovalchuk

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Method and estimation of parameters of dense part of electrical double layer at the interface electrode-solution of the dye in liquid crystal von O. V. Kovalchuk

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Adsorption of ions and thickness dependence of conductivity in liquid crystals von O. V. Kovalchuk

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Commemorating the 80-th Anniversary of Doctor of History, Professor I.Ph.Chernikov von O. O. Kovalchuk

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The first record of Scheenstia (Actinopterygii, Holostei) from the Late Cretaceous of Ukraine in the context of European occurrence of Mesozoic lepisosteiform fishes von L. S. Kyselevych, O. M. Kovalchuk

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