?url_ver=Z39.88-2004&rft_id=10.1007%2F3-540-45694-5_30&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Buscemi%2C+Maria+Grazia&rft.aulast=Buscemi&rft.aufirst=Maria+Grazia&rft.isbn=3-540-44043-7&rft.btitle=Proceedings+of+the+13th+International+Conference+on+Concurrency+Theory+(CONCUR+%E2%80%9902)&rft.title=A+First+Order+Coalgebraic+Model+of+pi-Calculus+Early+Observational+Equivalence&rft.date=2002&rft.genre=bookitem