@article{topicdiffusiondiscoverybasedonsparseness,
  title = {Topic Diffusion Discovery based on Sparseness-constrained Non-negative Matrix Factorization},
  author = {Yihuang Kang and Keng-Pei Lin and I-Ling Cheng},
  year = {2018},
  eprint = {1807.04386},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1807.04386v1},
}