@ARTICLE{ash:allerton:2004,
  author = {Joshua Ash and Lee Potter},
  title = {Sensor Network Localization via
	 Received Signal Strength Measurements with Directional Antennas},
  journal = {Proceedings of the Forty-Second
	 Annual Allerton Conference on Communication, Control, and Computing},
  year = {Champaign-Urbana , IL, Sep 2004},
  pages = {1861-1870},
}