@article{HartmannVulcanovSchuette2010, author = {Carsten Hartmann and V.-M. Vulcanov and Christof Sch{\"u}tte}, title = {Balanced Truncation of Second Order Systems}, journal = {Multiscale Model. Simul.}, volume = {8}, number = {4}, pages = {1348 -- 1367}, doi = {10.1137/080732717}, url = {http://publications.imp.fu-berlin.de/28/}, year = {2010}, }