@conference {DBLP:conf/plilp/BrogiCMMPRT94, title = {Implementations of Program Composition Operations}, booktitle = {PLILP}, year = {1994}, pages = {292-307}, author = {Antonio Brogi and A. Chiarelli and Paolo Mancarella and V. Mazzotta and Dino Pedreschi and Chiara Renso and Franco Turini} }