@article{poissongammadynamicalsystems,
  title = {Poisson--Gamma Dynamical Systems},
  author = {Aaron Schein and Mingyuan Zhou and Hanna Wallach},
  year = {2017},
  eprint = {1701.05573},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1701.05573v1},
}