@article{learninglatentandhierarchicalstructures,
  title = {Learning Latent and Hierarchical Structures in Cognitive Diagnosis Models},
  author = {Chenchen Ma and Gongjun Xu},
  year = {2021},
  eprint = {2104.02143},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2104.02143v2},
}