P. Becker, E. A. Pence; Radiated noise measurements from two unusual sources, Proceedings of MTS/IEEE OCEANS'77 Conference, pp. 192 - 197, September 1977.
Elbert A. Pence; Underwater tracking through ice cover, OCEANS'73 --- IEEE International Conference on Engineering in the Ocean Environment, pp. 514 - 518, September 1973.
Edward W. Early, Elbert A. Pence; The acoustic homing system of an unmanned arctic research submersible, OCEANS'72 --- IEEE International Conference on Engineering in the Ocean Environment, pp. 289 - 292, September 1972.