1. Acoustic emission prior to rockbursts and earthquakes;Amstrong;B.S.S.A.,1969
2. Detection of fracture initiation in rock specimens by use of a simple ultrasonic listening device;Barron;Int. J. Rock Mech. Min. Sci.,1971
3. Recent laboratory studies of earthquake mechanics and prediction;Brace;J. Phys. Earth.,1977
4. Study of elastic shocks caused by the fracture of heterogeneous materials and its relation to the earthquake phenomena;Mogi;Bull. Earth. Res. Int.,1962
5. Source location of elastic shock in the fracturing process in rocks;Mogi;Bull. Earth. Res. Inst.,1968