@article{MM2_1987__59_155249,
     author = {A.J. Tromba},
     title = {On an energy function for the {Weil-Petersson} metric on {Teichm\"uller} space.},
     journal = {Manuscripta mathematica},
     pages = {249--260},
     publisher = {mathdoc},
     volume = {59},
     year = {1987},
     zbl = {0635.58004},
     url = {http://geodesic.mathdoc.fr/item/MM2_1987__59_155249/}
}