Safi, B.F., Pham, L.T. and Busby, M.J. 1989. High voltage circuit breaker supported on a base isolating tripod for earthquake protection. Bulletin of the New Zealand Society for Earthquake Engineering. 22, 3 (Sep. 1989), 145–154. DOI:https://doi.org/10.5459/bnzsee.22.3.145-154.