6D,C, Rife, G,A. Vincent.Use of the Discrete Fourier Transform in the Measurement of Frequencies and Levcls of Tones, Bell Svst. Tech, J,pp,197-228, 1970.
7David C, Rife and Robert Boorstyn. Single-Tone Parameter Estimation from Discrete-Trine Observations.Trans,, 1974, 1T-20, (5), pp, 591-598.
