W. Lehle. Proceedings of the 24th International Conference on Environmental Systems and the 5th European Symposium on Space Environmental Control Systems, Warrendale, PA, SAE International, (1994)
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)