@phdthesis	{ lopez-phd-thesis,
  author	= "Julio Lopez",
  title		= "Methods for Querying Compressed Wavefields",
  school	= "Department of Electrical and Computer Engineering,
		   Carnegie Mellon University",
  month		= "May",
  year		= 2007,
  ulr		= "\url{http://www.cs.cmu.edu/~jclopez/jclopez-phd-thesis.pdf}"
}