Dubinski, J & Mutke, G 2005, 'Study of Temporal Changes of P-Wave Velocity in Polish Copper Mines in High Seismic Activity Zones', in Y Potvin & M Hudyma (eds), RaSiM6: Proceedings of the Sixth International Symposium on Rockburst and Seismicity in Mines Proceedings, Australian Centre for Geomechanics, Perth, pp. 631-634, https://doi.org/10.36487/ACG_repo/574_71
(https://papers.acg.uwa.edu.au/p/574_71_Dubinski/)