2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Minneapolis, MN, USA. IEEE: 5942-5945; ISBN 978-1-4244-3296-7
2001 Conference Proceedings of the 23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Istanbul, Turkey. volume 4; IEEE: 3913-3916; ISBN 978-0-7803-7211-5