@inproceedings{poissongammadynamicalsystems1,
  title = {Poisson-Gamma dynamical systems},
  author = {Aaron Schein and Hanna Wallach and Mingyuan Zhou},
  year = {2016},
  booktitle = {NeurIPS 2016 12},
  url = {http://papers.nips.cc/paper/6083-poisson-gamma-dynamical-systems},
}