Media type: E-Article Title: A Multi-Staged Blackboard Query Optimization Framework for World-Spanning Distributed Database Resources Contributor: Beran, Peter Paul; Mach, Werner; Schikuta, Erich; Vigne, Ralph Published: Elsevier BV, 2011 Published in: Procedia Computer Science, 4 (2011), Seite 156-165 Language: English DOI: 10.1016/j.procs.2011.04.017 ISSN: 1877-0509 Origination: Footnote: Access State: Open Access