@article{Liu09bmcLMS,
  author    = {Yu-Shen Liu and Yi Fang and Karthik Ramani},
  title     = {Using least median of squares for structural superposition of flexible proteins},
  journal   = {BMC Bioinformatics},
  volume    = {10},
  number    = {29},
  pages     = {1--23},
  year      = {2009},
}