@inproceedings{dammertz09wscg,
author = {Holger Dammertz and Johannes Hanika and Alexander Keller and Hendrik Lensch},
title = {A Hierarchical Automatic Stopping Condition for Monte Carlo Global Illumination},
booktitle = {Proc. of the WSCG 2010},
pages = {159--164},
year = 2010
}