Stephenson, W.R. and Smith, W.D. (1978) β€œβ€œThe importance of surface waves in strong ground motion". W. D. Smith: Bulletin of N.Z. National Society for Earthquake Engineering, Vol. 10, No. 4, December, 1978”., Bulletin of the New Zealand Society for Earthquake Engineering, 11(2), pp. 131–132. doi:10.5459/bnzsee.11.2.131-132.