Information and analytical support of making management decisions by the tour operator based on the system of complicated direct costing von R. S. Shulla, M. M. Popyk

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The Tourism and Recreation Potential of the Region: Essence and Factors of Influence von R. S. Shulla, M. M. Popyk, M. M. Pityulych

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Conceptual Approaches to Assessing the Quality of Life: Foreign Experience and Possibilities of Its Application in the National Theory and Practice von R. S. Shulla, M. M. Popyk, V. V. Zelich

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