Nguyen, H. T. and Truong, C. G. (2019) “The Correction of the Addendum Radius of the Internal Gear in the Oil Hypocycloid Pump to Achieve Equal Wear Rates”, Old Journal, (132), pp. 40–45. Available at: https://jst.vn/index.php/old/article/view/684 (Accessed: 5 October 2025).