00499naa#a2200169#i#450# EN\\bibl\577 20260204203856.3 1992-5980 20130930b2013####ek#y0engy0150####ca RUS RU Contact pressure analysis under static loading of elliptical and involute gears Journal article rostov on don Don state technical University 2013 5 с. Journal article local Lukonin Artem naukaru.ru