Leonardo Candela Fuat Akal Henri Avancini Donatella Castelli Luigi Fusco Veronica Guidetti Christoph Langguth Andrea Manzi Pasquale Pagano Heiko Schuldt Manuele Simi Michael Springmann Laura Cristiana Voicu DILIGENT: integrating digital library and Grid technologies for a new Earth observation research infrastructure. 59-80 2007 7 Int. J. on Digital Libraries 1-2 http://dx.doi.org/10.1007/s00799-007-0023-8 db/journals/jodl/jodl7.html#CandelaAACFGLMPSSSV07