van Benthem, S. A. C., Valenzuela, R. W., Obrebski, M., & Castro, R. R. (2008). Measurements of upper mantle shear wave anisotropy from stations around the southern Gulf of California. Geofísica Internacional, 47(2), 127–144. https://doi.org/10.1016/S0016-7169(13)71485-5