00521naa#a2200193#i#450# EN\\bibl\10617 20240816214030.5 1999-9836 20151217b2015####ek#y0engy0150####ca RUS RU About the Operation and Safety of Labor Journal article Moscow All-Russian center of living standards 2015 7 с. Journal article local Matskulyak I. Aliev U. Matskulyak D. naukaru.ru