1. Department of Numerical Analysis, HUN-REN Institute for Computer Science and Control, Eötvös Loránd University, Budapest H-1111, Hungary
2. Siemens Digital Industries Software, 68 Interleuvenlaan KU Leuven, Department of Mechanical Engineering, Leuven B-3001, Belgium
3. Department of Numerical Analysis, Eötvös Loránd University, Pázmány Péter sétány 1/C Budapest 1117, Hungary