@conference{theile1993trends, title = {Trends and Activities in the Development of Multichannel Sound Systems}, author = {Theile, Günther}, booktitle = {Audio Engineering Society Conference: 12th International Conference: The Perception of Reproduced Sound}, month = {Jun}, year = {1993}, url = {https://www.aes.org/e-lib/browse.cfm?elib=6240} }