Edmonds, F. D., Carr, A. J., Goldsmith, P. R., North, P. J., Wood, J. H. and Preston, R. L. (1980) “Section 4 Bridge foundations
”, Bulletin of the New Zealand Society for Earthquake Engineering, 13(3), pp. 248–261. doi: 10.5459/bnzsee.13.3.248-261.