参考文献

Knobelsdorf, James; Hays, Sheryl; Stankovic, Charles J.; Para, Kimberly S.; Connolly, Michael K.; Galatsis, Paul; Harter, William; Shahripour, Aurash B.; Plummer, Mark Stephen; Lunney, Beth; Janssen, Bernd; Fell, Jay Bradford Patent: US2003/96826 A1, 2003 ;