Castagna, J. P.; Batzle, M. L.; Eastwood, R. L. (1985). "Relationships between compressional-wave and shear-wave velocities in clastic silicate rocks". Geophysics. 50 (4): 571–581. Bibcode:1985Geop...50..571C. doi:10.1190/1.1441933.
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Castagna, J. P.; Batzle, M. L.; Eastwood, R. L. (1985). "Relationships between compressional-wave and shear-wave velocities in clastic silicate rocks". Geophysics. 50 (4): 571–581. Bibcode:1985Geop...50..571C. doi:10.1190/1.1441933.