Per anno

 @inproceedings{obs-woa2001,
    address = {Bologna, Italy},
    author = {Viroli, Mirko and Omicini, Andrea},
    booktitle = {AI*IA/TABOO Joint Workshop ``Dagli oggetti agli agenti: tendenze evolutive dei sistemi software'' (WOA 2001)},
    editor = {Omicini, Andrea and Viroli, Mirko},
    isbn = {88-371-1272-6},
    location = {Modena, Italy},
    month = {4--5}}},
    url = {http://lia.deis.unibo.it/books/woa2001/pdf/22.pdf},
    year = 2001
} 

 @proceedings{woa2001,
    address = {Bologna, Italy},
    booktitle = {WOA 2001 -- Dagli oggetti agli agenti: tendenze evolutive dei sistemi software},
    dblp = {conf/woa/2001},
    editor = {Omicini, Andrea and Viroli, Mirko},
    isbn = {88-371-1272-6},
    location = {Modena, Italy},
    month = {4--5}}},
    publisher = {Pitagora Editrice Bologna},
    title = {{WOA} 2001 -- {D}agli oggetti agli agenti: tendenze evolutive dei sistemi software},
    url = {http://lia.deis.unibo.it/books/woa2001/},
    year = 2001
} 

 @article{obs-aiia2001,
    author = {Viroli, Mirko and Omicini, Andrea},
    journal = {AI*IA Notizie},
    month = dec,
    number = 4,
    pages = {38--39},
    title = {Multi-Agent Systems as Composition of Observable Systems},
    volume = {XIV},
    year = 2001
}