db/conf/cikm/KamelF93.html Ibrahim Kamel Christos Faloutsos On Packing R-trees. 490-499 CIKM1993/P490.pdf 1993 conf/cikm/93 CIKM db/conf/cikm/cikm93.html#KamelF93 http://doi.acm.org/10.1145/170088.170403