M. Markova, A. Aula, T. Vainio, H. Wigelius, and M. Kulju. Proceedings of the 9th international conference on Human computer interaction with mobile devices and services, page 238--245. Singapore, ACM, (2007)
G. Tzagkarakis, B. Beferull-Lozano, and P. Tsakalides. Signals, Systems and Computers, 2004. Conference Record of the Thirty-Eighth
Asilomar Conference on, 1, page 397--401. IEEE Computer Society, (2004)
M. Spremic, Z. Žmirak, and K. Kraljevic. Proceedings of the 7th WSEAS International Conference on Software
Engineering, Parallel and Distributed Systems, page 187--192. Cambridge, UK, World Scientific and Engineering Academy and Society (WSEAS), (2008)