@conference{iimura1993ultrabass, title = {Ultrabass Reproducing Loudspeaker System}, author = {Iimura, Katsuhiko and Tanaka, Shouji and Kageyama, Satoshi}, booktitle = {Audio Engineering Society Convention 95}, month = {Oct}, year = {1993}, url = {https://www.aes.org/e-lib/browse.cfm?elib=6480} }