Al Kindi, M., M. Al-Lawati, and N. Al-Azri. “Estimating Drilling Cost and Duration Using Copulas Dependencies Models”. The Journal of Engineering Research [TJER] 14, no. 1 (March 1, 2017): 1–9. Accessed April 20, 2024. https://journals.squ.edu.om/index.php/tjer/article/view/182.