Heard, Garry J., David J. Thomson, Gordon R. Ebbeson, and Ronald I. Verrall. 1999. “Transmission of Acoustic Cross-Spectral Matrices over Low-Bandwidth Communications Channels”. Canadian Acoustics 27 (3):12-13. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1193.