Khalil, M. K. B., and D. M. Loper. “HYDRAULIC SYSTEM PROTECTION AGAINST CATASTROPHIC LINE FAILURE USING NEWLY DEVELOPED SAFETY VALVE”. International Journal of Fluid Power, vol. 9, no. 2, Aug. 2008, pp. 35-46, https://journals.riverpublishers.com/index.php/IJFP/article/view/526.