@article{harrell1995constant, title = {Constant-Beamwidth One-Octave Bandwidth End-Fire Line Array of Loudspeakers}, author = {Harrell, Jefferson A. and Hixson, Elmer L.}, journal = {J. Audio Eng. Soc}, volume = {43}, number = {7/8}, pages = {581--591}, year = {1995}, url = {https://www.aes.org/e-lib/browse.cfm?elib=7936} }