Per anno

 @incollection{obs-coord02,
    acm = {713583},
    author = {Viroli, Mirko and Omicini, Andrea},
    booktitle = {Coordination Models and Languages},
    doi = {10.1007/3-540-46000-4_33},
    editor = {Arbab, Farhad and Talcott, Carolyn},
    eisbn = {978-3-540-46000-8},
    eissn = {1611-3349},
    iris = {11585/951000},
    isbn = {978-3-540-43410-8},
    isbn10 = {3-540-43410-0},
    issn = {0302-9743},
    note = {5th International Conference (COORDINATION 2002), York, UK, 8--11~} # apr # {~2002. Proceedings},
    pages = {364--379},
    publisher = {Springer Berlin Heidelberg},
    scopus = {2-s2.0-23044534697},
    series = {Lecture Notes in Computer Science},
    title = {Tuple-based Models in the Observation Framework},
    url = {http://link.springer.com/10.1007/3-540-46000-4_33},
    volume = 2315,
    wos = {000181348700033},
    year = 2002
} 

 @article{observation-jucs8,
    author = {Viroli, Mirko and Omicini, Andrea},
    doi = {10.3217/jucs-008-04-0423},
    eissn = {0948-6968},
    iris = {11585/950202},
    issn = {0948-695x},
    journal = {Journal of Universal Computer Science},
    keywords = {coordination patterns, formal models, multi-agent systems},
    month = apr,
    number = 4,
    pages = {423--451},
    publisher = {J.UCS consortium},
    scopus = {2-s2.0-0010220748},
    title = {Modelling Agents as Observable Sources},
    url = {http://www.jucs.org/jucs_8_4/modelling_agents_as_observable},
    urlpdf = {http://www.jucs.org/jucs_8_4/modelling_agents_as_observable/Viroli_M.pdf},
    volume = 8,
    wos = {000177112700003},
    year = 2002
}