@Article{LIS66,
title = {An Automatic Registration Method for Frameless Stereotaxy, ImageGuided Surgery, and Enhanced Reality Visualization},
author = {W. Eric L. Grimson and Tomas Lozano-Perez and William M. Wells III and Gil J. Ettinger and Steve J. White and Ron Kikinis},
year = {1996},
url = {http://lis.csail.mit.edu/pubs/tlp/frameless-stereotaxy-ieee-tami.pdf},
journal = {IEEE Transaction on Medical Imaging},
volume = {15},
number = {2},
pages = {129--140},
}