@INPROCEEDINGS
        { CNenc01,
          TITLE = "Towards Measuring the Searching Complexity of Metric Spaces",
          AUTHOR = "E. Ch{\'a}vez and G. Navarro",
          BOOKTITLE = {Proc. 2nd International Mexican Conference in Computer 
		       Science (ENC)},
	  ADDRESS = "Aguascalientes, Mexico",
	  PUBLISHER = "Mexican Computer Science Society",
          YEAR = 2001,
	  PAGES = "969--978",
	  VOLUME = "II"
        }