WASET
Brahim, B. , Rahman, M. , Saad, M. , Luna, C.. "Iterative Estimator-Based Nonlinear Backstepping Control of a Robotic Exoskeleton". World Academy of Science, Engineering and Technology, Open Science Index 116, International Journal of Mechanical and Mechatronics Engineering (2016), 10(8), 1375 - 1381.