1. ITS de Irapuato, Tecnologico Nacional de Mexico, Irapuato, Guanajuato, México
2. School of Sciences, UASLP, San Luis Potosi, Mexico
3. School of Engineering and Sciences, Tecnologico de Monterrey, Monterrey, Nuevo Leon, Mexico
4. Department of Automatic Control, Technical University of Catalonia, Barcelona, Spain