“An Exploratory Framework for Assessing Open Source Software”
Systèmes d'information et management, Vol. 11, No. 1, September 2006, pp. 85-103
Miralles, F., Sieber, S., Valor, J.

“Market Bundling Strategies in the Horizontal Portal Industry”
International Journal of Electronic Commerce, Vol. 7, No. 4, Summer 2003, pp. 37-54
Valor, J., Sieber, S.
January 2003

“El impacto de Internet sobre la estructura de mercados”
Economía Industrial, No. 339, 2001/II, pp. 13-24
Sieber, S., Cassiman, B.
July 2002

“Managing Customer Switching Costs. A Framework for Competing in the Networked Environment”
Management Research, Vol. 1, No. 1, Winter 2002-2003, pp. 93-110
Ricart, J.E., Hess, M.
January 2003