1. Relation between earthquake foreshocks, stress and main shocks;Berg;Nature,1968
2. Characteristic parameters of fore- and aftershock sequences in the area of Greece;Drakopoulos,1968
3. Mean magnitude of an earthquake sequence;Hamilton;Bull. Seismol. Soc. Am.,1967
4. Magnitude stability in earthquake sequences;Lomnitz;Bull. Seismol. Soc. Am.,1966
5. The fracture of a semi-infinite body caused by an inner stress origin and its relation to earthquake phenomena (second paper);Mogi;Bull. Earthquake Res. Inst., Tokyo,1963