Zahn, F. A., R. Park, and M. J. N. Priestley. “The Use of Grade 380 Steel for Transverse Confining Reinforcement in Columns”. Bulletin of the New Zealand Society for Earthquake Engineering 20, no. 2 (June 30, 1987): 99-115. Accessed May 6, 2021. https://bulletin.nzsee.org.nz/index.php/bnzsee/article/view/814.