1. Aboulafia R. Bizjets search for optimism. AviationWeek; March 2004.
2. Beelaerts van Blokland WWA, Santema SC. Value chain innovation processes and the influence of co-innovation. In: Tools and methods of competitive engineering (TMCE), Ljubljana, Slovenia; 2006.
3. Beelaerts van Blokland WWA, Santema SC, Fiksinski MA, Amoa SOB. Qualifying the lean value network system; the lean metrics of co-investment and co-innovation on organization level. In: POM conference, Tokyo; 2008.
4. Beelaerts van Blokland WWA, Verhagen WJC, Santema SC. The effects of co-innovation on the value-time curve: quantitative study on product level. J Bus Market Manag. 2008;1(1):5–24.
5. Beelaerts van Blokland WWA, Van Silfhout GJ, Santema SC. Quantifying value flow for aerospace enterprises in business to business markets. In: 4th international conference on business market management, Copenhagen; 2009.