@article{MehlerMuellerGreineretal.2006,
  author    = {Gerhard Mehler and Berndt M{\"u}ller and Walter Greiner and Gerhard Soff},
  title     = {K-shell ionization by antiprotons},
  journal   = {Physical review A},
  volume    = {36},
  number    = {5},
  pages     = {1454 -- 1457},
  year      = {2006},
}