P. Kluegl, M. Toepfer, F. Lemmerich, A. Hotho, and F. Puppe. Mathematical Methodologies in Pattern Recognition and Machine Learning Springer Proceedings in Mathematics & Statistics, (2013)
J. Baumeister, D. Seipel, and F. Puppe. International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems, 11 (Suppl. Issue 2):
25-49(November 2003)