Ramin Ghaffari, Nikbakhsh Javadian. “Economic Assessment of Improper Performance Indicators and Pipeline Spill Intensity for Repair and Substitution (Case Study)”. The International Journal of Multiphysics 18, no. 4 (December 31, 2024): 882 - 891. Accessed October 5, 2025. https://themultiphysicsjournal.com/index.php/ijm/article/view/1637.