WASET
R.Isvandzibaei, M. , A.Jahani, A.. "Vibration of Functionally Graded Cylindrical Shells under Effects Free-free and Clamed-clamped Boundary Conditions". World Academy of Science, Engineering and Technology, Open Science Index 45, International Journal of Mechanical and Mechatronics Engineering (2010), 4(9), 800 - 805.