Gustavo Alonso Ulrich Fiedler Claus Hagen Amaia Lazcano Heiko Schuldt N. Weiler WISE: Business to Business E-Commerce. 132-139 1999 RIDE http://computer.org/conferen/proceed/ride/0119/01190132abs.htm db/conf/ride/ride99.html#AlonsoFHLSW99