Fischer, Tomas and Hainzl, Sebastian and Eisner, Leo and Shapiro, Serge A. and Le Calvez, J.  (2008) Microseismic signatures of hydraulic fracture growth in sediment formations: Observations and modeling.  Journal of Geophysical Research, 113 (B2).  DOI: https://doi.org/10.1029/2007JB005070 <https://doi.org/10.1029/2007JB005070>