@article{IM_1979__54_142678,
     author = {Stephen S. Kudla and John J. Millson},
     title = {Harmonic {Differentials} and {Closed} {Geodesics} on a {Riemann} {Surface.}},
     journal = {Inventiones mathematicae},
     pages = {193--212},
     publisher = {mathdoc},
     volume = {54},
     year = {1979},
     zbl = {0429.30038},
     url = {http://geodesic.mathdoc.fr/item/IM_1979__54_142678/}
}