@article{singleimagesuperresolutionbyapproximated,
  title = {Single image super-resolution by approximated Heaviside functions},
  author = {Liang-Jian Deng and Weihong Guo and Ting-Zhu Huang},
  year = {2015},
  eprint = {1503.03630},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1503.03630v1},
}