@article{matusiak2002fourth, title = {Fourth-Order Symmetrical Band-Pass Loudspeaker Systems}, author = {Matusiak, Grzegorz P. and Dobrucki, Andrzej}, journal = {J. Audio Eng. Soc}, volume = {50}, number = {1/2}, pages = {4--18}, year = {2002}, url = {https://www.aes.org/e-lib/browse.cfm?elib=11095} }