@article {BCMMPRT94, title = {Implementations of Program Composition Operations}, year = {1994}, note = {Programming Language Implementation and Logic Programming Lecture Notes in Computer Science, volume 844,}, pages = {292{\textendash}307}, author = {Antonio Brogi and A. Chiarelli and Paolo Mancarella and V. Mazzotta and Dino Pedreschi and Chiara Renso and Franco Turini} }