Cousins, W. J. ., Zhao, J. X., & Perrin, N. D. (1999). A model for the attenuation of peak ground acceleration in New Zealand earthquakes based on seismograph and accelerograph data. Bulletin of the New Zealand Society for Earthquake Engineering, 32(4), 193–220. https://doi.org/10.5459/bnzsee.32.4.193-220