@misc {IOPORT.70709156,
    author       = {Withalm, Josef and W\"olfel, Walter and Smolak, Ivan},
    title        = {Collaboration agents},
    howpublished = {ENTER, 289-300 (2007).},
    year         = {2007},
    doi          = {10.1007/978-3-211-69566-1_27},
    identifier   = {70709156},
}