Antonio Corral Michael Vassilakopoulos Yannis Manolopoulos The Impact of Buffering on Closest Pairs Queries Using R-Trees. 41-54 2001 conf/adbis/2001 ADBIS http://link.springer.de/link/service/series/0558/bibs/2151/21510041.htm db/conf/adbis/adbis2001.html#CorralVM01