@article{rs2002,
    author  = "Marielba Rojas and Danny C. Sorensen",
    title  = "A Trust-Region Approach to the Regularization of Large-Scale Discrete Forms of Ill-Posed Problems",
    journal = "SIAM J. Sci. Comput.",
    volume  = 23,
    number  = 6,
    pages   = "1843-1861",
    year    = 2002
}