@article{hasan09vsl,
  title   = {Virtual Spherical Lights for Many-Light Rendering of Glossy Scenes},
  author  = {Milo\v{s} Ha\v{s}an and Jaroslav K\v{r}iv\'anek and Bruce Walter and Kavita Bala},
  journal = {ACM Trans. Graph. (SIGGRAPH Asia '09)},
  volume  = {28},
  number  = {5},
  pages   = {XXX--XXX},
  year    = {2009}
}