Adnan Yaseen, A.; S. Alansari, L.; Hussain Alnajem, M.; S. Al-anssari, Q. Calculating the Frequency of Composite Plate and Composite Spherical Shell With Different Boundary Conditions. IJET 2018, 7 (4), 5007-5017. https://doi.org/10.14419/ijet.v7i4.25887.