Libkovska, asist. Dr.sc.admin. Una, Ozola, Inta, Krushalin, geogr. Viktor, Krushalin, asist. Kirill. "MANAGEMENT OF REGIONAL CLUSTERS: BASIC PRINCIPLES OF FORMATION OF TOURISM RECREATION CLUSTERS." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 15th International Multidisciplinary Scientific GeoConference SGEM2015, ECOLOGY, ECONOMICS, EDUCATION AND LEGISLATION (2015): 377-384. https://doi.org/10.5593/sgem2015/b53/s21.049