Benner, Peter TU Chemnitz; Other publications of the MPI staff, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society;
https://etna.math.kent.edu/vol.31.2008/pp256-270.dir/pp256-270.pdf (Verlagsversion)
Baur, U., & Benner, P. (2008). Cross-Gramian Based Model Reduction for Data-Sparse Systems. Electronic Transactions on Numerical Analysis, 31, 256-270.