Suasira, I Wayan, 		Tapayasa, I Made, 		Sutapa, I Ketut, AND 		Santiana, I Made Anom.
"Effectiveness of Using Hollow as Column Formwork Amplifier Compared with Wood Beam" <em>Logic : Jurnal Rancang Bangun dan Teknologi</em> [Online], Volume 20 Number 2 (30 July 2020)