MacDougald, Darey J., Paul C. Hines, and John C. Osler. 2002. “The Effects of Azimuthal Variability on Monostatic Acoustic Backscatter from the Seabed”. Canadian Acoustics 30 (3):98-99. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1473.