F. N. Spiess, C. D. Lowenstein, D. E. Boegeman, J. D. Mudie; Fine Scale Mapping Near the Deep Sea Floor, Proceedings of MTS/IEEE OCEANS'76 Conference, pp. 147 - 155, September 1976.
D. E. Boegeman, G. J. Miller, W. R. Normark; Precise positioning for near-bottom equipment using a relay transponder, OCEANS'71 --- IEEE International Conference on Engineering in the Ocean Environment, p. 219, September 1971.