@article{WernerDreizlerHeberetal.1995,
  author    = {Klaus Werner and S. Dreizler and Ulrich Heber and Thomas Rauch and Lutz Wisotzki and H.-J. Hagen},
  title     = {Discovery of two hot DO white dwarfs exhibiting ultrahigh-excitation absorption lines},
  year      = {1995},
}