@Article{npg-15-333-2008,
AUTHOR = {Vecchio, A. and Carbone, V. and Sorriso-Valvo, L. and De Rose, C. and Guerra, I. and Harabaglia, P.},
TITLE = {Statistical properties of earthquakes clustering},
JOURNAL = {Nonlinear Processes  in Geophysics},
VOLUME = {15},
YEAR = {2008},
NUMBER = {2},
PAGES = {333--338},
URL = {http://www.nonlin-processes-geophys.net/15/333/2008/},
ISSN = {1023-5809}
}