1. Budapest Univ. of Tech. and Eco.,Faculty of Elect. Eng. and Informatics,Dept. of Control Eng. and Inf. Tech.,Budapest,Hungary
2. Széchenyi István Univ.,Faculty Informatics and Elect. Eng.,Dept. of Informatics,Győr,Hungary
3. University of Canterbury,Dept. of Mech. Eng.,Christchurch,NZ