@article{gibson1972compatible, title = {Compatible FM Broadcasting of Panoramic Sound}, author = {Gibson, J. James and Christensen, Roy M. and Limberg, Allen L.R.}, journal = {J. Audio Eng. Soc}, volume = {20}, number = {10}, pages = {816--822}, year = {1972}, url = {https://www.aes.org/e-lib/browse.cfm?elib=2020} }