1. Curry, D: Android Statistics, Business of Apps (2022)
2. Callaham, J: The history of android: the evolution of the biggest mobile OS in the world, Android Authority (2021)
3. Drucker, P.F.: Management: Tasks, Responsibilities, Practices. Harper & Row, New York (1974)
4. Griffiths, D., Griffiths, D.: Head First Android Development: A Brain-Friendly Guide. O’Reilly Media, Inc., Sebastopol (2015)
5. Heller, E.: Wie Farbenwirken, Farbpsychologie – Farbsymbolik – Kreative Farbgestaltung. Verlag GmbH, Reinbekbei Hamburg (1999)