1. Allen, D. R., andMayuga, M. N. (1970),The mechanics of compaction and rebound, Wilmington oil field, Long Beach, California, U.S.A. In Land Subsidence (International Association of the Science of Hydrology, UNESCO Publ.89, 2) pp. 410?423.
2. Armbruster, J. G., Seeber, L., andEvans, K. (1987),The July 1987 Ashtabula Earthquake (m b 3.6) Sequence in Northeastern Ohio and a Deep Fluid Injection Well (abstract), Seismol. Res. Lett.58, 91.
3. Caloi, P., DePanfilis, M., DeFilippo, D., Marcelli, L., andSpadea, M. C. (1956),Terrimoti della Val Padana del 15?16 Maggio 1951, Ann Geophys.9, 63?105.
4. Cox, R. T. (1991),Possible Triggering of Earthquakes by Underground Waste Disposal in the El Dorado, Arkansas Area, Seismol. Res. Lett.62, 113?122.
5. Davis, S. D. (1985),Investigations of Natural and Induced Seismicity in the Texas Panhandle, M. S. Thesis, University of Texas, Austin, Texas, 230 pp.