@article{IM_1986__85_143369,
     author = {W.M. Goldman},
     title = {Invariant functions on {Lie} groups and {Hamiltonian} flows of surface group representations.},
     journal = {Inventiones mathematicae},
     pages = {263--302},
     publisher = {mathdoc},
     volume = {85},
     year = {1986},
     zbl = {0619.58021},
     url = {http://geodesic.mathdoc.fr/item/IM_1986__85_143369/}
}