00570naa#a2200181#i#450# EN\\bibl\8112 20250417163116.4 1999-5644 20151201b2015####ek#y0engy0150####ca RUS RU Experience of development of tourism services in polar regions in foreign countries Journal article CHERKIZOVO Russian State University of Tourism and Service 2015 10 с. Journal article local Sarancha Mikhail Mosalev Anton vestnik-rguts.editorum.ru