@article{jarosz09importance,
    author = {Wojciech Jarosz and Nathan A. Carr and Henrik Wann Jensen},
    title = {Importance Sampling Spherical Harmonics},
    journal = {Computer Graphics Forum (Proceedings of Eurographics 2009)},
    volume = {28},
    number = {2},
    year = {2009},
    month = apr,
    pages = {577--586},
    address = {Munich, Germany}
}