Dao, Tran Xuan, Nguyen Thai Son, and Nguyen The Vinh. “New Approach to Drill Bit Performance Evaluation With "Mechanical Specific Energy-MSE"”. Petrovietnam Journal 20 (February 26, 2015): 8-13. Accessed June 23, 2026. https://dacsandaukhi.com.vn/index.php/TCDK/article/view/423.