@misc{indiciaefce06456238f,
  title = {Links between PPCA and subspace methods for complete Gaussian density estimation.},
  author = {Chong Wang and Wenyuan Wang},
  year = {2006},
  doi = {10.1109/tnn.2006.871718},
  url = {https://pubmed.ncbi.nlm.nih.gov/16722180/},
  note = {Source identifier: 16722180}
}