@article{TramperStraalSanyaletal.2015,
  author    = {F. Tramper and S. M. Straal and D. Sanyal and Hugues Sana and A. de Koter and G. Gr{\"a}fener and N. Langer and J. S. Vink and S. E. de Mink and L. Kaper},
  title     = {Massive Wolf-Rayet stars on the verge to explode},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  series    = {the properties of the WO stars},
  pages     = {109 -- 112},
  year      = {2015},
}