@inproceedings{TangCrovella:pam2004,
  author	= {Tang, Liying and Crovella, Mark},
  title		= {Geometric Exploration of the Landmark Selection Problem},
  booktitle	= {Lecture Notes in Computer Science 3015, Proceedings of Passive and Active Measurement Workshop (PAM2004)},
  month		= apr,
  year		= {2004},
  pages		= {63--72},
  location	= {Juan-les-Pins, France},
  URL		= {http://www.cs.bu.edu/faculty/crovella/paper-archive/pam2004-landmark-selection.pdf}
}