@article{xu2020comprehensive,
  title={A comprehensive comparative study of clustering-based unsupervised defect prediction models},
  author={Xu, Zhou and Li, Li and Yan, Meng and Liu, Jin and Luo, Xiapu and Grundy, John and Zhang, Yifeng and Zhang, Xiaohong},
  journal={Journal of Systems and Software (JSS)},
  year={2020}
}