Duncan McGehee, Jules S. Jaffe; A Design Approach For Optimizing Segmented Transducers, Proceedings of IEEE OCEANS'91 Conference, pp. 1550 - 1555, October 1991.
Duncan McGehee; Theoretical And Experimental Design Of A Piezoelectric Transducer With A Shaded Gaussian Amplitude Distribution, Proceedings of IEEE OCEANS'91 Conference, p. 1740, October 1991.