@article{crowhurst1957some, title = {Some Defects in Amplifier Performance Not Covered by Standard Specifications}, author = {Crowhurst, Norman H.}, journal = {J. Audio Eng. Soc}, volume = {5}, number = {4}, pages = {195--202}, year = {1957}, url = {https://www.aes.org/e-lib/browse.cfm?elib=256} }