@article{1309752,
  author = {C.-K. Chan and D. Psaltis and F. {\"O}zel},
  title = {GRay: A Massively Parallel GPU-based Code for Ray Tracing in Relativistic Spacetimes},
  year = {2013},
  journal = {ApJ},
  volume = {777},
  pages = {13},
  language = {eng},
}