@article{papas11goal,
    author = {Marios Papas and Wojciech Jarosz and Wenzel Jakob and Szymon Rusinkiewicz and Wojciech Matusik and Tim Weyrich},
    title = {Goal-based Caustics},
    journal = {Computer Graphics Forum (Proceedings of Eurographics 2011)},
    volume = {30},
    number = {2},
    year = {2011},
    month = jun,
    pages = {503--511}
}