Mixed Virtual Reference Feedback Tuning - Iterative Feedback Tuning approach to the position control of a laboratory servo system. - Mircea-Bogdan Radac; Ramona-Bianca Grad; Radu-Emil Precup; Stefan Preitl; Claudia-Adina Dragos; Emil M. Petriu; Annamaria Kilyeni (EUROCON, 2011)