@article{SugawaraTsuboiMaedaetal.2015,
  author    = {Y. Sugawara and Y. Tsuboi and Y. Maeda and A. M. T. Pollock and P. M. Williams},
  title     = {The Swift monitoring of the colliding wind binary WR 21a},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  pages     = {366},
  year      = {2015},
}