Irawan, Candra, Rudy Djamaluddin, I Gusti Putu Raka, - Faimun, Priyo Suprobo, and - Gambiro. 2018. “Confinement Behavior of Spun Pile Using Low Amount of Spiral Reinforcement – an Experimental Study”. International Journal on Advanced Science, Engineering and Information Technology 8 (2):501-7. https://doi.org/10.18517/ijaseit.8.2.4343.