00501naa#a2200169#i#450# EN\\bibl\3279 20250331033653.1 2073-0462 20141010b2014####ek#y0engy0150####ca RUS RU Research of structural characteristics of reproduction processes of agrarian economy Journal article Kazan Kazan state agrarian University 2014 4 с. Journal article local Khayrullina Olga naukaru.ru