S. . Piyaphipat, B. . Phungpaingam, K. . Pinpatthanapong, and K. . Musiket, “Convergence Rate of N-sided Polygonal Node-based Strain Smoothed Finite Element for 2D Castellated Beam Analysis”, Eng. & Technol. Horiz., vol. 39, no. 3, pp. 29–40, Sep. 2022.