Erik Pontiskoski and  Kazuhiro Asakawa,  Overcoming Barriers to Open Innovation at Apple, Nintendo and Nokia.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2009, vol. 29(5). 370 - 375
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/11055.