Theodoros Tzouramanis Michael Vassilakopoulos Yannis Manolopoulos Multiversion Linear Quadtree for Spatio-Temporal Data. 279-292 http://link.springer.de/link/service/series/0558/bibs/1884/18840279.htm 2000 conf/adbis/2000 ADBIS-DASFAA db/conf/adbis/adbis2000.html#TzouramanisVM00