@article{acomparisonoflatticefreediscriminative,
  title = {A Comparison of Lattice-free Discriminative Training Criteria for Purely Sequence-Trained Neural Network Acoustic Models},
  author = {Chao Weng and Dong Yu},
  year = {2018},
  eprint = {1811.03700},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1811.03700v2},
}