BibTeX Entry: Soft Shadow Volumes for Ray Tracing

@article{Laine2005sg, 
  author =    {Samuli Laine and Timo Aila and Ulf Assarsson and Jaakko Lehtinen and Tomas Akenine-M\"oller},
  title =     {Soft Shadow Volumes for Ray Tracing},
  journal =   {ACM Transactions on Graphics},
  year =      {2005},
  pages =     {1156--1165},
  volume =    {24},
  number =    {3},
  publisher = {ACM}
}