J. Hox, and C. Maas. Social Science Methodology in the New Millennium. Proceedings of the Fifth International Conference on Logic and Methodology, Opladen, RG, Leske + Budrich Verlag, (2002)
M. Kuhn, A. Griffo, J. Wang, and J. Bals. Proceedings of the 13th European Conference on Power Electronics and Applications EPE'09, page 1--10. Piscataway, NJ, IEEE, (2009)