00505naa#a2200181#i#450# EN\\bibl\5939 20250107020929.2 2073-0462 20150325b2015####ek#y0engy0150####ca RUS RU ENERGY OPTIMIZATION METHOD OF MAIN PARAMETERS OF TRACTORS Journal article Kazan Kazan state agrarian University 2015 6 с. Journal article local Khafizov Kamil Khafizov Ramil naukaru.ru