Okal & Reymond 2003. Okal, E. A.; Reymond, D. (2003). "The mechanism of great Banda Sea earthquake of 1 February 1938: Applying the method of preliminary determination of focal mechanism to a historical event". Earth and Planetary Science Letters. 216 (1–2): 1–15. Bibcode:2003E&PSL.216....1O. doi:10.1016/S0012-821X(03)00475-8.
Okal & Reymond 2003. Okal, E. A.; Reymond, D. (2003). "The mechanism of great Banda Sea earthquake of 1 February 1938: Applying the method of preliminary determination of focal mechanism to a historical event". Earth and Planetary Science Letters. 216 (1–2): 1–15. Bibcode:2003E&PSL.216....1O. doi:10.1016/S0012-821X(03)00475-8.