Android-ViewPagerIndicator - Paging indicator widgets compatible with the ViewPager from the Android Support Library and ActionBarSherlock. Originally based on Patrik Åkerfeldt's ViewFlow.
A. Girardello, и F. Michahelles. Proceedings of the 12th international conference on Human computer interaction with mobile devices and services, стр. 431--434. New York, NY, USA, ACM, (2010)