1. Parsons, C. 1998. Carderock, MD: U.S. Navy Naval Surface Center. Private Communication
2. Spicer, J. W. M., Champion, J. L., Osiander, R. and Spicer, J. B. Joint Army Navy NASA Air Force NDE Subcommittee Meeting. pp.91–100. CPIA Publication 637
3. Spicer, J. W. M., Osiander, R., Champion, J. L. and Spicer, J. B. 1996.Progress in Natural Science, 6, ed. Edited by: Zhang, S. Y. S72–S75.