1. Asproni, G. R., Fassò, C. A., & Putzu, G. (1981). Italian method for design of storms sewers. Proceedings of 2nd international conference on urban storm drainage, Urbana, Illinois, USA (pp. 475–481).
2. Engineering applications of correlation and spectral analysis;Bendat,1980
3. Structure detection and model validity tests in the identification of nonlinear systems;Billings;IEE Proceedings,1983
4. Correlation based model validity tests for non-linear models;Billings;International Journal of Control,1986
5. Nonlinear model validation using correlation tests;Billings;International Journal of Control,1994