Christophe Gurret Yannis Manolopoulos Apostolos Papadopoulos Philippe Rigaux The BASIS System: A Benchmarking Approach for Spatial Index Structures. 152-170 http://link.springer.de/link/service/series/0558/bibs/1678/16780152.htm 1999 conf/stdbm/1999 Spatio-Temporal Database Management db/conf/stdbm/stdbm99.html#GurretMPR99