1. A manual for general least squares model fitting;Celmiņš;Ballistic Research Laboratory Technical Report ARBRL-TR-02151,1979
2. Least squares optimization with implicit model equations;Celmiņš,1983
3. Analysis of residuals from multidimensional model fitting;Celmiņš;Computers and Chemistry,1984
4. Linear regression analysis with fuzzy model;Tanaka;IEEE Trans. Systems Man Cybernet.,1982
5. Fuzzy mathematical programming;Verdegay,1982