Dankelman Jenny, Grimbergen Cornelis A, Stassen Henk G
Man Machine Systems Group, Faculty of Mechanical Engineering and Marine Technology, Delft University of Technology.
Biomed Instrum Technol. 2005 Jan-Feb;39(1):60-3. doi: 10.2345/0899-8205(2005)39[60:EFPSTC]2.0.CO;2.