KIS, H. R.; Bnо-AyrianM. K. THEORETICAL ANALYSIS OF APPROACHES TO ORGANIZATION OF THE INTERACTION OF NEGOTIATION GROUPS OF COUNTRIES ON INTERNATIONAL ENERGY MARKETS. Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas (Series: Economics and Management in the Oil and Gas Industry), n. 1(19), p. 21-30, 20 May 2019.