00561naa#a2200181#i#450# EN\\bibl\6588 20240426152952.5 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 philosoph.editorum.ru