“A STUDY OF THE EFFECT OF SEMI-ANGLE OF CONE ON THE VIBRATION CHARACTERISTICS OF CYLINDRICAL-CONICAL COUPLED SHELL STRUCTURE ”. Journal of Engineering 18, no. 05 (May 1, 2012): 651–660. Accessed July 4, 2024. https://joe.uobaghdad.edu.iq/index.php/main/article/view/2146.