@techreport{wan_tr2012,
author = {Wan, Shenghua and Ye, Tengfei and Li, Maoqing and Zhang, Hongchao and Li, Xin},
institution = {Louisiana State University, School of Electrical Engineering and Computer Science",
title = {Efficient Hierarchical Optimization for Spherical Mapping},
month = {October},
year = {2012}
}