00478naa#a2200157#i#450# EN\\bibl\23353 20240506011011.1 2542-1840 20171025b2017####ek#y0engy0150####ca RU IMPLEMENTATION OF OPEN ONLINE COURSES IN SUPPLEMENTARY PROFESSIONAL EDUCATION Journal article Kemerovo Kemerovo State University 2017 4 с. Journal article local Dochkin Sergey A. jcenter.kemsu.ru