A revised r*-tree in comparison with related index structures.

Norbert Beckmann Bernhard Seeger A revised r*-tree in comparison with related index structures. 799-812 2009 SIGMOD Conference http://doi.acm.org/10.1145/1559845.1559929 conf/sigmod/2009 db/conf/sigmod/sigmod2009.html#BeckmannS09