1. A study of earthquake mechanism using S wave data;Adams;Bull. Seismol. Soc. Amer.,1958
2. The mechanism at the focus of an earthquake;Byerly;Earthquake Notes,1958
3. Shear-wave vibrational directions and related fault movements in Southern California earthquakes;Dehlinger;Bull. Seismol. Soc. Amer.,1952
4. Ueber die Schwingungsrichtung eines Bodenteilchens in den transversalen Wellen der zweiten Vorphase eines Bebens;Galitzin;Bull. Acad. Imp. Sci., St. -Pétersbourg,1911