Sumit Mehra Peter J. Werkhoven Marcel Worring Navigating on handheld displays: Dynamic versus static peephole navigation. 448-457 2006 13 ACM Trans. Comput.-Hum. Interact. 4 http://doi.acm.org/10.1145/1188816.1188818 db/journals/tochi/tochi13.html#MehraWW06