Jörn Loviscach. Two-finger input with a standard touch screen. In Chia Shen, Robert J. K. Jacob, Ravin Balakrishnan, editors, Proceedings of the 20th Annual ACM Symposium on User Interface Software and Technology, Newport, Rhode Island, USA, October 7-10, 2007. pages 169-172, ACM, 2007. [doi]
Abstract is missing.