@techreport{NA-09/01,
  title = "On solving trust-region and other regularised subproblems in optimization",
  author = "H. Sue Dollar, Nicholas I. M. Gould, and Daniel P. Robinson",
  year = "2009",
  institution = "Oxford University Computing Laboratory",
  keywords = "Regularization, trust-region subproblem",
  month = "February",
  number = "NA-09/01",
  pages = "48",
  series = "NA Group technical reports",
}