@article{klipsch1963regarding, title = {Regarding a -Derived Third Stereo Channel-}, author = {Klipsch, Paul W.}, journal = {J. Audio Eng. Soc}, volume = {11}, number = {3}, pages = {282}, year = {1963}, url = {https://www.aes.org/e-lib/browse.cfm?elib=797} }