Lee, K.C., Orense, R.P. and Jeng, F.S. 2012. Dynamic frictional behaviour of synthetic sandstone under low normal stress and seismic excitation. Bulletin of the New Zealand Society for Earthquake Engineering. 45, 2 (Jun. 2012), 71–76. DOI:https://doi.org/10.5459/bnzsee.45.2.71-76.