00497naa#a2200169#i#450# EN\\bibl\113060 20260120051016.2 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 vestnik.nvsu.ru