1. Backus, G. (1970): A Geometrical Picture of Anisotropic Elastic Tensors. Review of Geophysics and Space Physics,8, 633?671.
2. Byerlee, J. D., Lockner, D. (1977): Acoustic Emission During Fluid Injection into Rock. Proceedings of the 1st Conference on Acoustic Emission/Microseismic Activity in Geologic Structures and Materials, The Pennsylvania State University, June 1975. Trans. Tech. Pub., Clausthal, 87?98.
3. Cete, A. (1977): Seismic Source Location in the Ruhr District. Proceedings of the 1st Conference on Acoustic Emission/Microseismic Activity in Geologic Structures and Materials, The Pennsylvania State University, June 1975, Trans. Tech. Pub., Clausthal, 231?241.
4. Chang, H. S. (1984): A Study of Acoustic Emission Source Location Generated in Stressed Rock Solved by a Least Squares Iterative Technique. M. S. Thesis, Department of Civil Engg., Northwestern University.
5. Friedman, M., Bur, T. R. (1974): Investigation of the Relation Among Residual Strain, Fabric, Fracture and Ultrsonic Attenuation and Velocity in Rocks. Int. J. of Rock Mech. Min. Sci. and Geomech. Abstracts11, 221?234.