@article {IOPORT.50267242,
    author       = {Chen, Jiating and Wang, Bin and Yong, Jun-Hai},
    title        = {Improved stochastic progressive photon mapping with metropolis sampling},
    year         = {2011},
    journal      = {Comput. Graph. Forum},
    volume       = {30},
    number       = {4},
    pages        = {1205-1213},
    doi          = {10.1111/j.1467-8659.2011.01979.x},
    identifier   = {50267242},
}