The SB<sup>+</sup>-Tree: An Efficient Index Structure for Joining Spatial Relations.

Azzam Ibrahim Farshad Fotouhi Sayed F. Hasan The SB<sup>+</sup>-Tree: An Efficient Index Structure for Joining Spatial Relations. 163-182 1997 11 International Journal of Geographical Information Science 2 db/journals/gis/gis11.html#IbrahimFH97