Per anno

 @inproceedings{respect-sac98,
    acm = {330665},
    author = {Denti, Enrico and Natali, Antonio and Omicini, Andrea},
    booktitle = {1998 ACM Symposium on Applied Computing (SAC'98)},
    dblp = {conf/sac/DentiNO98},
    doi = {10.1145/330560.330665},
    isbn = {0-89791-969-6},
    location = {Atlanta, GA, USA},
    month = {27}}},
    pages = {169--177},
    publisher = {ACM},
    scopus = {2-s2.0-85002410745},
    title = {On the Expressive Power of a Language for Programming Coordination Media},
    url = {http://dl.acm.org/citation.cfm?id=330665},
    urlpdf = {http://delivery.acm.org/10.1145/340000/330665/p169-denti.pdf},
    year = 1998
}