@article{losmandy1969operational, title = {Operational Amplifier Applications for Audio Systems}, author = {Losmandy, B. J.}, journal = {J. Audio Eng. Soc}, volume = {17}, number = {1}, pages = {14--21}, year = {1969}, url = {https://www.aes.org/e-lib/browse.cfm?elib=1610} }