@article{unchainthesearchspacewithhierarchical,
  title = {Unchain the Search Space with Hierarchical Differentiable Architecture Search},
  author = {Guanting Liu and Yujie Zhong and Sheng Guo and Matthew R. Scott and Weilin Huang},
  year = {2021},
  eprint = {2101.04028},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2101.04028v2},
}