Separable Nonlinear Least Squares with Multiple Right-Hand Sides. - Linda Kaufman; Garrett S. Sylvester (SIAM J. Matrix Anal. Appl., 1992)

Structured Linear Least-Squares Problems in System Identification and Separable Nonlinear Data Fitting. - Linda Kaufman; Garrett S. Sylvester; Margaret H. Wright (SIAM J. Optim., 1994)