1. Department of Multidisciplinary Engineering Texas A&M University 6200 Tres Lagos Blvd McAllen Texas 78504 USA
2. Department of Physics and Mathematics Universidad Iberoamericana 880 Prol. Paseo de la Reforma primer nivel Mexico City 01219 Mexico
3. Department of Mathematics and Physics ITESO University 8585 Anillo Perif. Sur Manuel Gómez Morín Tlaquepaque Jalisco 45609 Mexico
4. Department of Mathematics, College of Sciences and Arts Qassim University Ar Rass Kingdom of Saudi Arabia