The elk (Alces alces L.) as a part of former and modern fauna of the Sumy region: changes of number and its causes за авторством O. Kovalchuk

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Leonid Rekovets — an outstanding palaeomammalogist and evolutionist за авторством O. Kovalchuk

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Research the Cossack Elite in the First Half of the Nineteenth Century: a Historiographic, Source Studies' and Archeographic Aspect за авторством O. Kovalchuk

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Kolomyikas' stylistics: affixation role in forming of kolomyika's expressiveness за авторством O. Kovalchuk

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Kolomyika in genre system of ukrainians' and other slavonic neighbouring peoples' folklore за авторством O. Kovalchuk

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

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I.F. Chernikov's 75 Birthday за авторством O. O. Kovalchuk

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

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

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Foreign Direct Investment In Ukraine in the Context of Integration Into the European Union за авторством N. O. Kovalchuk

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

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Modernization paradigm of European rural development policy: institutional approach, challenges, prospects за авторством T. Zinchuk, O. Kovalchuk, T. Usiuk

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The Factors that Determine the Capital Structure of Domestic Enterprises in Changing Economic Conditions за авторством N. O. Kovalchuk, Yu. I. Fedoruk

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Approaches to the Evaluation of the Financial and Economic Safety of the Domestic Enterprises за авторством N. O. Kovalchuk, A. H. Korbutiak

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Current State and Features of Venture Investment Development in Ukraine за авторством N. O. Kovalchuk, L. I. Sopivnyk

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Short-term results in patients with refractory angina treatment using stem cells за авторством S. I. Estrin, T. V. Kravchenko, A. O. Kovalchuk

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Enamel ultrastructure of lower molars of the red squirrel Sciurus vulgaris (Rodentia, Mammalia) from different populations in Ukraine за авторством L. Rekovets, O. Kovalchuk, V. Demeshkant, L. Shevchenko

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The Value and Content of Investment and Innovation Activities of Domestic Enterprises за авторством N. O. Kovalchuk, K. A. Smolnikova, K. I. Zhaloba

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The Analytical Aspects of Management of the Liquidity Level and Solvency of Enterprises in the Energy Industry за авторством A. V. Biliavska, I. R. Mizunska, N. O. Kovalchuk

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Taxonomic analysis of the collection of the department of flower-ornamental plants of Kremenets Botanical Garden за авторством I. O. Kovalchuk, O. I. Beridze, Ya. A. Hetman

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