1. F. Freitas J. Rommes N. Martins IEEE Trans. Power Systems 23(3), 1258-1270 (2008).
2. P. Benner J. Saak Math. Comput. Model. Dyn. Sys. 17(2), 123-143 (2011), DOI:10.1080/13873954.2010.540822.
3. P. Benner P. Kürschner J. Saak Improved second-order balanced truncation for symmetric systems, Tech. Rep. MPIMD/11-13, Max Planck Institute Magdeburg Preprints, December 2011.
4. J. Saak http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200901642
5. P. Benner B. Kranz J. Saak M. M. Uddin Computation of a Compact State Space Model for a Spindle Head Configuration with Piezo Actuators using Balanced Truncation, submitted to Production Engineering - Research and Development.