Jérôme Darmont Christophe Fromantin Stephane Régnier Le Gruenwald Michel Schneider Dynamic Clustering in Object-Oriented Databases: An Advocacy for Simplicity http://arxiv.org/abs/0705.0281 2007 CoRR abs/0705.0281 db/journals/corr/corr0705.html#abs-0705-0281 informal publication