1. K. De Vere, iOS device sales leapfrog android, 2012. Retrieved on June 2013 from: http://www.insidemobileapps.com/2012/07/24/ios-device-sales-leapfrog-android-with-410-million-devices-sold/.
2. S. Perez, iTunes App Store Now Has 1.2 Million Apps, Has Seen 75 Billion Downloads To Date. TechCrunch, 2014. Retrieved on May 2015 from: http://techcrunch.com/2014/06/02/itunes-app-store-now-has-1-2-million-apps-has-seen-75-billion-downloads-to-date/.
3. Service-oriented technology and management: Perspectives on research and practice for the coming decade;Demirkan;Electron. Commer. Res. Appl.,2008
4. IT service platforms: their value creation model and the impact of their level of openness on their adoption;Gebregiorgis,2015
5. Value creation in IT service platforms through two-sided network effects;Haile,2012