1. Apple Inc. iOS accessibility 2013 (last accessed 2013/09/18). http://www.apple.com/accessibility/ios/. Apple Inc. iOS accessibility 2013 (last accessed 2013/09/18). http://www.apple.com/accessibility/ios/.
2. Apple Inc. Use your voice to do even more with Siri 2013 (last accessed 2013/09/18). http://www.apple.com/ios/siri/. Apple Inc. Use your voice to do even more with Siri 2013 (last accessed 2013/09/18). http://www.apple.com/ios/siri/.
3. Big Idea Media Ltd. Most broken mobiles damaged within first 3 months of owning 2013 (last accessed 2013/09/18). http://www.mobileinsurance.co.uk/Information/Blog/1017-/Most-Broken-Mobiles-Damaged-Within-First-3-Months-of-Owning. Big Idea Media Ltd. Most broken mobiles damaged within first 3 months of owning 2013 (last accessed 2013/09/18). http://www.mobileinsurance.co.uk/Information/Blog/1017-/Most-Broken-Mobiles-Damaged-Within-First-3-Months-of-Owning.
4. Big Idea Media Ltd. Quarter of iphone owners using handset with broken screen - mobile insurance blog 2013 (last accessed 2013/09/18). http://www.mobileinsurance.co.uk/Information/Blog/1004-/Quarter-of-iPhone-Owners-Using-Handset-with-Broken-Screen. Big Idea Media Ltd. Quarter of iphone owners using handset with broken screen - mobile insurance blog 2013 (last accessed 2013/09/18). http://www.mobileinsurance.co.uk/Information/Blog/1004-/Quarter-of-iPhone-Owners-Using-Handset-with-Broken-Screen.
5. A study on icon arrangement by smartphone users