@Article{LIS4,
title = {A Geometric Modeling System for Automated Mechanical Assembly},
author = {M. A. Wesley and T. Lozano-Perez and L. I. Lieberman and M. A. Lavin and D. D. Grossman},
year = {1980},
url = {http://lis.csail.mit.edu/pubs/tlp/ibm-journal-r&d-1980.pdf},
journal = {IBM Journal of Rsearch and Development},
volume = {24},
number = {1},
pages = {64--74},
}