?url_ver=Z39.88-2004&rft_id=10.1007%2F978-3-540-78739-6_21&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Torres+Vieira&rft.aufirst=Hugo+&rft.au=Torres+Vieira%2C+Hugo+&rft.date=2008&rft.title=The+conversation+calculus%3A+a+model+of+service-oriented+computation&rft.btitle=Programming+Languages+and+Systems&rft.isbn=978-3-540-78739-6&rft.genre=bookitem