@conference{sowden1994planar, title = {Planar Loudspeaker Technology - Applications in the Real World}, author = {Sowden, Christopher Topper and Ampel, Frederick J.}, booktitle = {Audio Engineering Society Convention 96}, month = {Feb}, year = {1994}, url = {https://www.aes.org/e-lib/browse.cfm?elib=6392} }