00500naa#a2200169#i#450# EN\\bibl\113060 20260719155737.7 2311-1402 20120925b2012####ek#y0engy0150####ca RUS RU Social and professional communities in northern cities Journal article Nizhnevartovsk Nizhnevartovsk State University 2012 4 с. Journal article local Aminov Salavat Rifgatovich filvestnik.nvsu.ru