00441naa#a2200157#i#4500001001500000005001700015011001400032100004100046102000700087200006600094210004600160215001000206608002700216700001900243856002100262EN\\bibl\2331720240425173640.4##a2542-1840##a20180525b2018####ek#y0engy0150####ca##aRU1#aSERVICES AGREEMENT: CONCLUSION AND EXECUTIONeJournal article1#aKemerovocKemerovo State Universityd2018##a5 с.##aJournal article2local#1aBadziakgN. E.4#ajcenter.kemsu.ru