TY - JOUR T1 - Implementations of Program Composition Operations Y1 - 1994 A1 - Antonio Brogi A1 - A. Chiarelli A1 - Paolo Mancarella A1 - V. Mazzotta A1 - Dino Pedreschi A1 - Chiara Renso A1 - Franco Turini N1 - Programming Language Implementation and Logic Programming Lecture Notes in Computer Science, volume 844, ER -