Clone join and shadow join: two parallel spatial join algorithms.

Jignesh M. Patel David J. DeWitt Clone join and shadow join: two parallel spatial join algorithms. 54-61 2000 conf/gis/2000 ACM-GIS http://doi.acm.org/10.1145/355274.355282 db/conf/gis/gis2000.html#PatelD00