@inproceedings{mitra2004estimatingdata,
 author = {Mitra NJ, Nguyen A, Guibas L},
 title = {Estimating surface normals in noisy point cloud data},
 year = {2004},
 booktitle = {INTERNATIONAL JOURNAL OF COMPUTATIONAL GEOMETRY & APPLICATIONS},
 volume = {14},
 number = {4-5},
}