Kassem, Saad, Taher Salah El-Din, and Siegfried Helduser. 2013. “MOTION SYNCHRONIZATION ENHANCEMENT OF HYDRAULIC SERVO CYLINDERS FOR MOULD OSCILLATION”. International Journal of Fluid Power 13 (1):51-60. https://journals.riverpublishers.com/index.php/IJFP/article/view/697.