Uncertain receivables: formation of accounting policies von T. I. Yefimenko

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The mid-carboniferous boundary in Donbass (by foraminifera and algae) von V. I. Yefimenko

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The main achievements and trends of the development of the Department of paleontology and stratigraphy of the Paleozoic deposits of the Institute of the Geological Sciences of NAS... von V. I. Polietaiev, N. I. Boiarina, V. I. Yefimenko, Yu. Kotliar, T. I. Nemyrovska

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Main directions and results of modernization of Carboniferous and Permian stratigraphic chards of Ukraine (1993-2014) von V. I. Polietaiev, N. I. Boiarina, M. V. Vdovenko, V. I. Yefimenko, T. I. Nemyrovska, O. K. Shchoholiev, H. H. Kovalenko

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