B. Livres, C. , and J. , Tapworthy: Designing Great IPhone Apps. publication place: O'Reilly Media, p.310, 2010.

G. , S. Johnson, and J. , Designing the IPhone User Experience: A User-Centered Approach to Sketching and Prototyping IPhone Apps Designing with the Mind in Mind: Simple Guide to Understanding User Interface Design Rules, p.186, 2010.