S. Yu, C. Böhm, H. Chen, and F. Allgöwer. Proc. 14th Int. Conf. Methods and Models in Automation and Robotics, page 354-359. Miedzyzdroje, Poland, (2009)
R. Roman, Z. Nagy, F. Allgöwer, and S. Agachi. Proc. 15th European Symp. Computer Aided Process Engineering (ESCAPE), page 1363-1368. Barcelona, Spain, (2005)