BIBCYT http://bibcyt.ucla.edu.ve/cgi-win/be_alex.exe?Ultimo&Nombrebd=BIBCYT UCLA - Biblioteca de Ciencias y Tecnologia Felix Morales Bueno Buschmann, Frank P Principal Schmidt, Douglas C. schmidt@cs.wustl.edu P Principal Henney, Kevlin P Principal Past, Present, and Future Trends in Software Patterns pp. 31-37