Valdiero, Antonio Carlos, Raul Guenther, Edson Roberto De Pieri, and Victor Juliano De Negri. 2007. “CASCADE CONTROL OF HYDRAULICALLY DRIVEN MANIPULATORS WITH FRICTION COMPENSATION”. International Journal of Fluid Power 8 (1):7-16. https://journals.riverpublishers.com/index.php/IJFP/article/view/543.