00515naa#a2200169#i#450# EN\\bibl\37285 20240624055648.1 2500-3372 20200423b2020####ek#y0engy0150####ca RU Transformation of Social Insurance as an Instrument of Social Security Journal article Kemerovo Kemerovo State University 2020 7 с. Journal article local Miller Olga S. Morozova Elena Alekseevna vestnik-hss.kemsu.ru