@Article{Yuetal:2009:ACMTAP,
  author  = {Insu Yu and Andrew Cox and Min H. Kim and Tobias Ritschel and Thorsten Grosch and Carsten Dachsbacher and Jan Kautz},
  title   = {Perceptual Influence of Approximate Visibility in Indirect Illumination},
  journal = {ACM Transactions on Applied Perception (Presented at APGV 2009)},
  year    = {2009},
  volume  = {6},
  number  = {4},
  pages   = {24:1-24:14},
  doi     = "1609967.1609971",
  URL     = "http://dl.acm.org/citation.cfm?doid=1609967.1609971"
}