@article{KetteringGramley2013,
  author    = {Klaus Kettering and Felix Gramley},
  title     = {Catheter ablation of atrial fibrillation : radiofrequency catheter ablation for redo procedures after cryoablation},
  journal   = {World journal of cardiology},
  volume    = {5},
  number    = {8},
  pages     = {280 -- 287},
  doi       = {10.4330/wjc.v5.i8.280},
  year      = {2013},
}