@article{HartmannSchuette2005, author = {Carsten Hartmann and Christof Sch{\"u}tte}, title = {A Constrained Hybrid Monte-Carlo Algorithm and the Problem of Calculating the Free Energy in Several Variables}, journal = {Z. Angew. Math. Mech.}, volume = {85}, number = {10}, pages = {700 -- 710}, doi = {10.1002/zamm.200410218}, url = {http://publications.imp.fu-berlin.de/47/}, year = {2005}, }