@article{jarosz08beam,
    author = {Wojciech Jarosz and Matthias Zwicker and Henrik Wann Jensen},
    title = {The Beam Radiance Estimate for Volumetric Photon Mapping},
    journal = {Computer Graphics Forum (Proceedings of Eurographics 2008)},
    volume = {27},
    number = {2},
    year = {2008},
    month = apr,
    pages = {557--566}
}