@article{rst2002a,
    author  = "Marielba Rojas and Trond Steihaug",
    title  = "An interior-point trust-region-based method for large-scale non-negative regularization. ",
    journal = "Inverse Problems",
    volume  = 18,
    number  = 5,
    pages   = "1291-1307",
    year    = 2002
}