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  1. McCann, W. R., Nishenko, S. P., Sykes, L. R., andKrause, J. (1979),Seismic Gaps and Plate Tectonics: Seismic Potential for Major Boundaries, Pure Appl. Geophys117, 1082–1147.

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Okal, E.A. Introduction. PAGEOPH 135, 167–168 (1991).

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