Query Processing of Spatial Objects: Complexity versus Redundancy.

http://dx.doi.org/10.1007/3-540-56869-7_21 Michael Schiwietz Hans-Peter Kriegel Query Processing of Spatial Objects: Complexity versus Redundancy. 377-396 SSD/1993/P377.pdf 1993 conf/ssd/93 SSD db/conf/ssd/ssd93.html#SchiwietzK93