Lesniak, Andrzej and Isakow, Zbigniew  (2008) Space–time clustering of seismic events and hazard assessment in the Zabrze-Bielszowice coal mine, Poland.  International Journal of Rock Mechanics and Mining Sciences, 46 (5).  pp. 918-928. DOI: https://doi.org/10.1016/j.ijrmms.2008.12.003 <https://doi.org/10.1016/j.ijrmms.2008.12.003>