00587naa#a2200193#i#450# EN\\bibl\2944 20241118170816.1 1995-042X 20140626b2014####ek#y0engy0150####ca RUS RU Methodological approach to the cosmic products and services classification Journal article CHERKIZOVO Russian State University of Tourism and Service 2014 11 с. Journal article local Zaichko Valeriy Zhiganov Aleksandr Maksimov Aleksandr naukaru.ru