Meggett, L. M., and R. C. Fenwick. “Seismic Behaviour of a Reinforced Concrete Portal Frame Sustaining Gravity Loads”. Bulletin of the New Zealand Society for Earthquake Engineering 22, no. 1 (March 31, 1989): 39–49. Accessed April 17, 2026. https://bulletin.nzsee.org.nz/article/view/786.