@inproceedings{NPCspire02,
  Author = {G.{}~Navarro and R.~Paredes and E.~Ch{\'a}vez},
  Booktitle = {Proceedings of the 9th International Symposium on String Processing and Information Retrieval (SPIRE 2002)},
  Note = {doi:10.1007/3-540-45735-6},
  Pages = {298--309},
  Publisher = {Springer},
  Series = {LNCS},
  Title = {$t$-Spanners as a Data Structure for Metric Space Searching},
  Volume = {2476}, 
  Year = {2002}}