00468naa#a2200181#i#450# EN\\bibl\7423 20241128012544.4 2225-8272 20150928b2015####ek#y0engy0150####ca RUS RU SOCIAL SECURITY MALIH AND MEDIUM ENTERPRISES Journal article Moscow RANEPA 2015 7 с. Journal article local Ivanov Khristo Ivanova Mariya naukaru.ru