@INPROCEEDINGS{CIVEMSA2020,
  author={M. {Abukmeil} and S. {Ferrari} and A. {Genovese} and V. {Piuri} and F. {Scotti}},
  booktitle={2020 IEEE International Conference on Computational Intelligence and Virtual Environments for Measurement Systems and Applications (CIVEMSA)}, 
  title={On Approximating the Non-negative Rank: Applications to Unsupervised Image Reduction}, 
  year={2020},
  volume={},
  number={},
  pages={1--6}
}