1. Boatwright J, Fletcher JB (1984) The partition of radiated energy between P and S waves. Bull Seismol Soc Am 74:361–376
2. Butler AG (1997) Space-time clustering of potentially damaging seismic events and seismic viscosity at Western Deep Levels East and West Mines. In: Gibowicz S, Lasocki S (eds) Proceedings of Rockbursts and Seismicity in Mines, Krakow, pp 89–93
3. Falmagne V (2001) Quantification of rockmass degradation using microseismic monitoring and applications for mine design. Unpublished PhD thesis, Queens University, Kingston, Canada, p 400
4. Gibowicz SJ, Young RP, Talebi S, Rawlence DJ (1992) Source parameters of seismic events at the underground research laboratory in Manitoba, Canada: scaling relations for events with moment magnitude smaller than −2. Bull Seismol Soc Am 81:1157–1182
5. Guha S, Rastogi R, Skim K (1999) ROCK: a robust clustering algorithm for categorical attributes. In: Proceedings of the IEEE conference on data engineering