Fernsel2018A.md

@article{Fernsel2018A,
  title={A survey on surrogate approaches to non-negative matrix factorization},
  author={Fernsel, Pascal and Maass, Peter},
  journal={Vietnam Journal of Mathematics},
  volume={46},
  number={4},
  pages={987--1021},
  year={2018},
  publisher={Springer}
}