@article{cohen1955multi, title = {Multi-impedance, Multifrequency Crossover networks for Multispeaker Systems}, author = {Cohen, Abraham B.}, journal = {J. Audio Eng. Soc}, volume = {3}, number = {1}, pages = {40--48}, year = {1955}, url = {https://www.aes.org/e-lib/browse.cfm?elib=30} }