1. Antonius, Behaviour of High-Strength Concrete Columns Subjected to Concentric and Eccentric Axial Loads, Dissertation, Institut Teknologi Bandung, 2001 (in Indonesian).
2. O. Bayrak, Seismic Performance of Rectilinearly Confined High-Strengh Concrete Columns, Ph.D. Dissertation, Univ. of Toronto, 1999.
3. Indonesian National Standard, Requirements of Structural Concrete for Building, SNI-2847-2013 (in Indonesian).
4. New Zealand Standard, Concrete and Structures Standard, Part 1-The Design of Concrete Structures, NZS 3101: Part 1: 2006.
5. Antonius, Performance of High-Strength Concrete Columns Confined by Medium Strength of Spirals and Hoops, Asian Journal of Civil Engineering, 15(2), 2014, pp.245-258.