@conference{theile1999surround, title = {Surround Sound Guidelines for Operational Practice}, author = {Theile, Günther and Steinke, Gerhard}, booktitle = {Audio Engineering Society Conference: UK 14th Conference: Audio - The Second Century}, month = {Jun}, year = {1999}, url = {https://www.aes.org/e-lib/browse.cfm?elib=7983} }