DoiF06'

@article{DBLP:journals/disopt/DoiF06,
  author    = {Takashi Doi and
               Toshihiro Fujito},
  title     = {A primal-dual method for approximating tree cover with two
               weights},
  journal   = {Discrete Optimization},
  volume    = {3},
  number    = {3},
  year      = {2006},
  pages     = {230-237},
  ee        = {http://dx.doi.org/10.1016/j.disopt.2006.05.005},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}