@article{bahrehmand_rafeh_2011, 
  title={Proposing a New Metric for Collaborative Filtering}, 
  volume={04}, 
  DOI={10.4236/jsea.2011.47047}, 
  number={07}, 
  publisher={Scientific Research Publishing, Inc,}, 
  author={Bahrehmand and Rafeh}, 
  year={2011}
  }