1. Approximate spectral analysis by least-squares fit;Vaníček;Astrophys. Space Sci.,1969
2. Further development and properties of the spectral analysis by least-squares;Vaníček;Astrophys. Space Sci.,1971
3. A Wavelet Tour of Signal Processing;Mallat,1999
4. Least-Squares Spectral Analysis Revisited;Wells,1985
5. The Least-Squares Spectrum, Its Inverse Transform and Autocorrelation Function: Theory and Some Application in Geodesy;Craymer,1998