1. Gibbs, J. W. and E. B. Wilson, Vector Analysis, 2nd ed., Scribner, New York, 1909. Reprint by Dover, New York, 1960.
2. Lindell, I. V., Methods for Electromagnetic Field Analysis, 2nd ed., University Press, Oxford, 1995.
3. Ben-Menahem, A. and S. J. Singh, Seismic Waves and Sources, Springer, New York, 1981.
doi:10.1007/978-1-4612-5856-8
4. Morse, P. M. and H. Feshbach, Methods of Theoretical Physics, Part 1, 66–73, McGraw-Hill, New York, 1953.
5. Musgrave, M. J. P., Crystal Acoustics, Holden-Day, San Francisco, 1970.
6. Nye, J. F., Physical Properties of Crystals, University Press, Oxford, 1998 (reprint of the original 1957 edition with corrections).
7. Bedford, A. and D. S. Drumheller, Introduction to Elastic Wave Propagation, Wiley, Chichester, 1994.
8. Kiselev, A. P., "Body waves in a weakly anisotropic medium — I. Plane waves," Geophys. J. Int., Vol. 118, 393-400, 1994.
doi:10.1111/j.1365-246X.1994.tb03971.x
9. Kiselev, A. P., "Point sources of vibration in a weakly anisotropic elastic medium," Sov. Phys. Dokl., Vol. 33, No. 6, 466-467, June 1988.