Beranek, Leo L.; Nichols, Rudolph H.; Rudmose, H. Wayne; Sleeper, Harvey P.; Wallace, Robert L.; Ericson, Harold L. Principles of Sound Control in Airplanes (报告). Office of Scientific Research and Development, National Defense Research Committee: 68. 1944 [2022-02-15]. (原始内容存档于2023-12-23).
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Exner, D. W., Parallel Operation of Airplane Alternators, Technical Data Digest 10 (1) (Technical Data Library, Engineering Division), January 1944, 10 (1): 33–34 [2022-02-15], (原始内容存档于2023-12-07)
Beranek, Leo L.; Nichols, Rudolph H.; Rudmose, H. Wayne; Sleeper, Harvey P.; Wallace, Robert L.; Ericson, Harold L. Principles of Sound Control in Airplanes (报告). Office of Scientific Research and Development, National Defense Research Committee: 68. 1944 [2022-02-15]. (原始内容存档于2023-12-23).
Exner, D. W., Parallel Operation of Airplane Alternators, Technical Data Digest 10 (1) (Technical Data Library, Engineering Division), January 1944, 10 (1): 33–34 [2022-02-15], (原始内容存档于2023-12-07)