@article{bauer1973quadraphonic, title = {Quadraphonic Matrix Perspective-Advances in SQ Encoding and Decoding Technology}, author = {Bauer, Benjamin B. and Allen, Richard G. and Budelman, Gerald A. and Gravereaux, Daniel W.}, journal = {J. Audio Eng. Soc}, volume = {21}, number = {5}, pages = {342--350}, year = {1973}, url = {https://www.aes.org/e-lib/browse.cfm?elib=1970} }