@article{wolf1962an, title = {An Investigation of Speed Variations in a Magnetic Tape Recorder, with the Aid of Electro-Mechanical Analogies}, author = {Wolf, Werner}, journal = {J. Audio Eng. Soc}, volume = {10}, number = {2}, pages = {119--129}, year = {1962}, url = {https://www.aes.org/e-lib/browse.cfm?elib=864} }