@article {jopera:30,
title = {JOpera: a Toolkit for Efficient Visual Composition of Web Services},
author = {Cesare Pautasso and Gustavo Alonso},
journal = {International Journal of Electronic Commerce (IJEC)},
volume = {9},
year = {2004},
month = {Winter 2004/2005},
pages = {107-141},
keywords = {Scalable Process Execution, Visual Programming Languages, Web Service Composition},
URL = {http://www.gvsu.edu/business/ijec/v9n2/},
}