@article{aiger20084pointsregistration,
 author = {Aiger D, Mitra NJ, Cohen-Or D},
 title = {4-points Congruent Sets for Robust Surface Registration},
 year = {2008},
 journal = {ACM Trans. on Graphics (TOG) (Proc. SIGGRAPH)},
 volume = {27},
 number = {3},
}