@article{SweeneySeubertStarketal.2012,
  author    = {Reinhart A. Sweeney and Benedikt Seubert and Silke Stark and Vanessa Homann and Gerd M{\"u}ller and Michael Flentje and Matthias Guckenbeger},
  title     = {Accuracy and inter-observer variability of 3D versus 4D cone-beam CT based image-guidance in SBRT for lung tumors},
  year      = {2012},
}