BibTeX Entry: Ambient Occlusion Fields (ShaderX⁴ article)

@inbook{Kontkanen2006shaderx4,
  author =    {Janne Kontkanen and Samuli Laine},
  title =     {Ambient Occlusion Fields},
  editor =    {Wolfgang Engel},
  booktitle = {ShaderX^4},
  year =      {2005},
  pages =     {101--108},
  chapter =   {2.4},
}