Solving Clamped Kirchhoff Plate Bending Problems Using Superposition of Sinusoidal and Polynomial Basis Functions in the Ritz Variational Method. IJCE [Internet]. 2024 Dec. 1 [cited 2025 Jun. 28];18(2):52-7. Available from: https://ijce.uoanbar.edu.iq/ijce/article/view/283