1. ‘A digital spectral analysis technique and its application to radio astronomy’, Tech. Rep., 412, MIT, Res. Lab. Electron., Cambridge, Mass., 1963 p. 119
2. Cooper, B.F.C.: ‘Autocorrelation spectrometers’, Meeks, M.L., Methods of experimental physics, (Academic Press, New York 1976),12, p. 289–298 part B
3. ‘The spectrum of clipped noise’, Harvard University, Radio Res. Lab., Cambridge, Mass., 1943 p. 37