00483naa#a2200169#i#450# EN\NORMA\bibl\1358 20260202162357.1 1605-6590 20140226b2014####ek#y0engy0150####ca RUS RU Principles of Contract Law: Reflection in Labor Legislation Journal article Moscow Legal publishing house Norm 2014 7 с. Journal article local Filyushchenko Lyudmila zh-szf.ru