@article{190412359,
  title = {Unsupervised Feature Learning for Point Cloud by Contrasting and Clustering With Graph Convolutional Neural Network},
  author = {Ling Zhang and Zhigang Zhu},
  year = {2019},
  eprint = {1904.12359},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1904.12359v3},
}