Svetlana Mansmann Florian Mansmann Marc H. Scholl Daniel A. Keim Hierarchy-driven Visual Exploration of Multidimensional Data Cubes. http://www.btw2007.de/paper/p96.pdf 96-111 2007 conf/btw/2007 BTW db/conf/btw/btw2007.html#MansmannMSK07