@article{Xu:2013:ASG,<br>
author = {Kun Xu and Wei-Lun Sun and Zhao Dong and Dan-Yong Zhao and Run-Dong Wu and Shi-Min Hu},<br>
title = {Anisotropic Spherical Gaussians},<br>
journal = {ACM Trans. Graph.},<br>
volume = {32},<br>
number = {6},<br>
year = {2013},<br>
pages = {209:1--209:11},<br>
}<br>