@inproceedings{ EfrosBMM03,
  author = {A.A. Efros and A.C. Berg and G. Mori and J. Malik},
  title ={Recognizing Action at A Distance},
  booktitle = {Proc. 9th Int. Conf. Computer Vision},
  volume = {2},
  pages = {726-733},
  year = {2003}
}