Claus Bitten Jörn Gehring Uwe Schwiegelshohn Ramin Yahyapour The NRW-Metacomputer-Building Blocks for A Worldwide Computational Grid. 31-40 2000 Heterogeneous Computing Workshop http://computer.org/proceedings/hcw/0556/05560031abs.htm db/conf/hcw/hcw2000.html#BittenGSY00