@article{fastbtgforestbasedhierarchicalsub,
  title = {Fast BTG-Forest-Based Hierarchical Sub-sentential Alignment},
  author = {Hao Wang and Yves Lepage},
  year = {2017},
  eprint = {1711.07265},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1711.07265v1},
}