@article{machinelearninginforblockchainfutureand,
  title = {Machine Learning in/for Blockchain: Future and Challenges},
  author = {Fang Chen and Hong Wan and Hua Cai and Guang Cheng},
  year = {2019},
  eprint = {1909.06189},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1909.06189v3},
}