@InProceedings{l06-p286-297,
  AUTHOR	= {Edgar Ch\'avez and Stefan Dobrev and Evangelos Kranakis and Jaroslav Opatrny and Ladislav Stacho and Jorge Urrutia},
  TITLE		= {Local Construction of Planar Spanners in Unit Disk Graphs with Irregular Transmission Ranges},
  YEAR		= 2006,
  BOOKTITLE	= {Proc.~of the 7th Latin American Symposium on Theoretical Informatics (LATIN'06)},
  ADDRESS	= {Valdivia, Chile},
  PAGES		= {286--297},
  KEYWORDS	= {}}