@article{etna_vol43_pp223-243,
  author  = {Lothar Reichel and  Xuebo Yu},
  title   = {Matrix decompositions for Tikhonov regularization},
  journal = {Electron. Trans. Numer. Anal.},
  volume  = {43},
  year    = {2014-2015},
  pages   = {223--243},
}