?url_ver=Z39.88-2004&rft_id=10.1007%2F3-540-54430-5_77&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=De+Nicola&rft.au=De+Nicola%2C+Rocco&rft.aufirst=Rocco&rft.title=Action+and+State-based+Logics+for+Process+Algebras&rft.btitle=CONCUR+1991&rft.isbn=3-540-54430-5&rft.date=1991&rft.genre=bookitem