1. Roundoff error analysis for Gram-Schmidt method and solution of linear least squares problems;Abdelmalek;BIT,1971
2. An efficient line search for nonlinear least-squares;Al-Baali;J. Optim. Theory Appl.,1986
3. On computing bounds for the least singular value of a triangular matrix;Anderson;BIT,1975
4. Geodetic normal equations;Ashkenazi,1971
5. Solution of very large least squares problems by nested dissection on a parallel processor;Avila,1979