1. Caccamo, D., Barbieri, F.M., D’Amico, S., Lagan, C., Parrillo, F.: The temporal series of the New Guinea aftershock sequence. P.E.P.I. 153(4), 175–180 (2005)
2. Caccamo, D., Barbieri, F.M., Lagan, C., D’Amico, S., Parrillo, F.: A study about the aftershock sequence of 27 December 2003 in Loyalty Islands. B.G.T.A. (in press, 2006)
3. Console, R., Di Giovambattista, R.: Local earthquake relative location by digital records. Phys. Of the Earth and Plan. Int. 47, 43–49 (1987)
4. Utsu, T., Seki, A.: A relation between the area of aftershock region and the energy of mainshock. J. Seismol. Soc. Jpn 7, 233–240 (1954)
5. Utsu, T.: Aftershocks and earthquake statistics (I) source parameters which characterize an aftershock sequence and their interrelations. J. Fac. Sci. Hokkaido Univ., Ser. VII 3, 129–195 (1969)