@article{GDZPPN00117004X,
title = {Derivative Free Analogues of the Levenberg-Marquardt and Gauss Algorithms for Nonlinear Least Squares Approximation.},
journal = {Numerische Mathematik},
volume = {18},
year = {1971},
pages = {289-297},
zbl = {0235.65043},
url = {http://dml.mathdoc.fr/item/GDZPPN00117004X}
}
Brown, K.M.; Dennis, J.E. jr. Derivative Free Analogues of the Levenberg-Marquardt and Gauss Algorithms for Nonlinear Least Squares Approximation.. Numerische Mathematik, Tome 18 (1971) pp. 289-297. http://gdmltest.u-ga.fr/item/GDZPPN00117004X/