Edmonds, F. D., A. J. Carr, P. R. Goldsmith, P. J. North, J. H. Wood, and R. L. Preston. “Section 4 Bridge foundations
”. Bulletin of the New Zealand Society for Earthquake Engineering, vol. 13, no. 3, Sept. 1980, pp. 248-61, doi:10.5459/bnzsee.13.3.248-261.