1. An Introduction to Multivariate Statistical Analysis;Anderson,1958
2. An Introduction to Multivariate Statistical Analysis;Anderson,2003
3. Smoothing the “smoothing” cubic spline functions;Andronov;Publications of the Astronomical Institute of the Czechoslovak Academy of Sciences,1987
4. Period search using the DMRT method – the properties of the test function;Andronov;Astronomische Nachrichten,1988