@misc {IOPORT.70739025,
    author       = {Stojanovic, Nenad},
    title        = {On discovering user's needs in the ontology-based portals using implicit relevance feedback},
    howpublished = {GI Jahrestagung (2), 182-186 (2004).},
    year         = {2004},
    identifier   = {70739025},
}