The NorduGrid production Grid infrastructure, status and plans. - Paula Eerola; Balázs Kónya; Oxana Smirnova; Tord Ekelöf; Mattias Ellert; John Renner Hansen; Jakob Langgaard Nielsen; Anders Wäänänen; Aleksandr Konstantinov; Juha Herrala; Miika Tuisku; T. Myklebust; et al. (GRID, 2003)