@InProceedings{	  iv2009-cartelli,
  author	= "Elena Cardarelli AND Paolo Medici AND Pier Paolo Porta AND
		  Guido Ghisio",
  title		= "Road signs shapes detection based on Sobel phase analysis",
  booktitle	= "Procs.~IEEE Intelligent Vehicles Symposium 2009",
  year		= 2009,
  address	= "Xi'an, China",
  month		= jun,
  eprint	= "10.1109/IVS.2009.5164307",
  pages		= "376--381"
}