1. Singular value decomposition of a complex matrix;Bussinger;Communication of the ACM,1969
2. On least squares with insufficient observations;Chipman;Journal of the American Statistical Association,1964
3. Constrained linear models;Gerig;Institute of Statistics Mimeograph Series,1972
4. Computing methods for linear models subject to linear parametric constraints;Gerig;Journal of Statistical Computation and Simulation,1974
5. Calculating the singular values and pseudo-inverse of a matrix;Golub;Journal on Numerical Analysis,1965