J. Díaz, F. Orejas (eds.) ; : gw, : us. -- Springer-Verlag, c1989. -- (Lecture notes in computer science ; 352 . TAPSOFT '89 : proceedings of the International Joint Conference on Theory and Practice of Software Development, Barcelona, Spain, March 13-17, 1989 / J. Díaz, F. Orejas (eds.) ; v. 2).