00549naa#a2200181#i#450# EN\\bibl\6588 20241010152250.4 1993-7768 20150828b2015####ek#y0engy0150####ca RUS RU Improving the life cycle of information systems for small and medium business Journal article CHERKIZOVO Russian State University of Tourism and Service 2015 6 с. Journal article local Shlapak Vera Teodorovich Nataliya zh-szf.ru