Cho, N. F. and Tiampo, Kristy F. and Mckinnon, S. D. and Vallejos, J. A. and Klein, W. and Dominguez, R.  (2010) A simple metric to quantify seismicity clustering.  Nonlinear Processes in Geophysics, 17 (4).  pp. 293-302. DOI: https://doi.org/10.5194/npg-17-293-2010 <https://doi.org/10.5194/npg-17-293-2010>