Phuangruangsri, Chatchawal, and Pornpen Limpaninlachat. “Experimental and Evaluation of Flexural Capacity in Voided RC Slab With Internal Truncated Pyramid Shaped Voids”. The 28th National Convention on Civil Engineering, vol. 28, June 2023, pp. STR08-1, https://conference.thaince.org/index.php/ncce28/article/view/2590.