@INPROCEEDINGS{blum2010ismar,
  author = {L. Wang and M. Springer and H. Heibel and N. Navab},
  title = {{Floyd-Warshall All-Pair Shortest Path for Accurate Multi-Marker Calibration}},
  booktitle = {{Proceedings of the 9th International Symposium on Mixed and Augmented Reality (ISMAR)}},
  address =	 {Seoul, South Korea},
  year = {2010},
  month = {October}
}