@inproceedings{McDonald11ecmr,
   author = {J.B. McDonald and M. Kaess and C. Cadena and J. Neira and
	J.J. Leonard},
   title = {6-{DOF} Multi-session Visual {SLAM} using Anchor Nodes},
   booktitle = {European Conference on Mobile Robots (ECMR)},
   pages = {69-76},
   address = {Orebro, Sweden},
   month = {Sep},
   year = {2011}
}