00684naa#a2200193#i#450# EN\\bibl\120533 20260418011526.6 2073-5537 20260416b2026####ek#y0engy0150####ca RU Digital services in the hospitality industry Journal article Astrakhan Astrakhan State Technical University 2026 6 с. Journal article local Экономическая политика в области туризма. Экономика туризма. 338.48 Romanova Larisa Mihaylovna Bal Nina Viktorovna Tsaturyan Eric Samvelovich vestnik.astu.org