1. J. Aron, S.K. Chang, R. Dworak, et al. Sonic compressional measurements while drilling, in: Proceedings of SPWLA 35th Annual Logging Symposium, 1994.
2. J.V. Leggett III, V. Dubinsky, D. Patterson, Measurement-while-drilling acoustic system employing multiple, segmented transmitters and receivers, U.S. Patent (6614360), 2003.
3. T. Kinoshita, T. Endo, H. Nakajima, et al. Next generation LWD sonic tool, in: proceedings of 14th SPWLA Formation Evaluation Symposium of Japan, 2008.
4. Tube waves and mandrel modes: Experiment and theory;Hsu;J. Acoust. Soc. Am.,1997
5. Multipole acoustic logging-while- drilling;Tang,2002