Musiket, K., B. Phungpaingam, and S. Piyaphipat. “Free and Forced Vibration Analysis by N-Sided Polygonal Edge-Based Strain Smoothed Finite Element for 2D Problem”. RMUTP Research Journal Sciences and Technology, vol. 17, no. 2, Dec. 2023, pp. 53-66, doi:10.14456/jrmutp.2023.21.