@article{JMLR:v22:20-084,
  author  = {Tiffany M. Tang and Genevera I. Allen},
  title   = {Integrated Principal Components Analysis},
  journal = {Journal of Machine Learning Research},
  year    = {2021},
  volume  = {22},
  number  = {198},
  pages   = {1--71},
  url     = {http://jmlr.org/papers/v22/20-084.html}
}