@INPROCEEDINGS {
        { NRsccc02,
          TITLE = "Dynamic Spatial Approximation Trees",
          AUTHOR = "G. Navarro and N. Reyes",
	  BOOKTITLE = "Proc. XXI Conference of the Chilean
			Computer Science Society (SCCC)",
	  PAGES = "213--222",
	  PUBLISHER = "IEEE CS Press",
          YEAR = 2001
        }