Dowrick, D. J., K. R. Berryman, G. H. McVerry, and J. X. Zhao. “Earthquake Hazard in Christchurch ”. Bulletin of the New Zealand Society for Earthquake Engineering, Vol. 31, no. 1, Mar. 1998, pp. 1-23, https://bulletin.nzsee.org.nz/index.php/bnzsee/article/view/551.