by N. Menzel, M. Guthe
Reference:
g-BRDFs: An Intuitive and Editable BTF Representation (N. Menzel, M. Guthe), In Comput. Graph. Forum, volume 28, 2009.
Bibtex Entry:
@Article{menzel09gBRDFs,
title = "g-{BRDF}s: An Intuitive and Editable {BTF} Representation",
author = "Menzel, N. and Guthe, M.",
journal = "Comput. Graph. Forum",
year = "2009",
number = "8",
volume = "28",
pages = "2189-2200",
bibdate = {2010-10-08},
url = "http://onlinelibrary.wiley.com/doi/10.1111/j.1467-8659.2009.01432.x/abstract"
}