Volume 13, Number 50 (April-June) 2011

Vértice Universitario Magazine Year 13 No. 50, April-June 2011, is a quarterly publication edited by the University of Sonora, through the Division of Economic and Administrative Sciences. Responsible editor: María Eugenia De la Rosa Leal. Reservation of Rights to Exclusive Use 04-2011-011410054200-102, ISSN: 2007-1388 granted by the National Copyright Institute. Legality of title: 13976. Legality of Content: 11549. both granted by the Qualifying Commission for Publications and Illustrated Magazines of the Ministry of the Interior. Printed by Imagen Digital del Noroeste, Veracruz no. 19, Col. San Benito, Hermosillo, Sonora, Mexico, this issue was finished printing on July 29, 2011 with a print run of 400 copies. The opinions expressed by the authors do not necessarily reflect the position of the editor of the publication. Total or partial reproduction of the contents and images of the publication is strictly prohibited without prior authorization from the University of Sonora.