@article{DBLP:journals/tog/WalterHSG97,
author = {Bruce Walter and
Philip M. Hubbard and
Peter Shirley and
Donald P. Greenberg},
title = {Global Illumination Using Local Linear Density Estimation},
journal = {ACM Trans. Graph.},
volume = {16},
number = {3},
year = {1997},
pages = {217-259},
ee = {http://doi.acm.org/10.1145/256157.256158},
bibsource = {DBLP, http://dblp.uni-trier.de}
}