@article { 516,
title = {On Differential Photometric Reconstruction for Unknown, Isotropic BRDFs},
journal = {IEEE Transactions on Pattern Analysis and Machine Intelligence (PAMI)},
volume = {35},
number = {12},
year = {2013},
month = {Dec},
pages = {2941-2955},
URL = {http://graphics.berkeley.edu/papers/Chandraker-ODP-2012-09/index.html},
author = {Manmohan Chandraker and Jiamin Bai and Ravi Ramamoorthi}
}