Affiliation: | a School of Mechanical Engineering, Ctr of Composite Mat. and Structures, University of Natal, Durban 4041, South Africa b Department of Mathematics and Statistics, American University of Sharjah, Sharjah, United Arab Emirates c Department of Mechanical and Environmental Engineering, University of California, Santa Barbara, CA 93106, USA d Department of Mathematics, University of California, Santa Barbara, CA 93106, USA |