@article{hollywood1961a, title = {A Stereophonic Transmission System for AM Broadcasting}, author = {Hollywood, John M. and Kronenberg, Marvin}, journal = {J. Audio Eng. Soc}, volume = {9}, number = {2}, pages = {140--144}, year = {1961}, url = {https://www.aes.org/e-lib/browse.cfm?elib=473} }