WASET
Lhoucine, B. , Khalid, E. , Rhali, B.. "Geometrically Non-Linear Axisymmetric Free Vibration Analysis of Functionally Graded Annular Plates". World Academy of Science, Engineering and Technology, Open Science Index 83, International Journal of Aerospace and Mechanical Engineering (2013), 7(11), 2290 - 2299.