Angular velocity and position control of a permanent magnet stepper motor. - Rafael Castro-Linares; Jaime Álvarez-Gallegos; E. Alvarez-Sanchez (ECC, 2003)

Modeling and controller design of a magnetic levitation system with five degrees of freedom. - E. Alvarez-Sanchez; Jaime Álvarez-Gallegos; Rafael Castro-Linares (ICINCO, 2005)