00473naa#a2200169#i#450# EN\\bibl\113274 20260118143714.7 2311-1402 20080625b2008####ek#y0engy0150####ca RUS RU Professor izyashchnykh nauk A.F.Merzlyakov Journal article Nizhnevartovsk Nizhnevartovsk State University 2008 6 с. Journal article local Emel'yanov B V vestnik.nvsu.ru