@article{IM_1995__121_3_144297,
     author = {Ehud de Shalit},
     title = {p-adic periods and modular symbols of elliptic curves of prime conductor.},
     journal = {Inventiones mathematicae},
     pages = {225--256},
     year = {1995},
     volume = {121},
     number = {3},
     zbl = {1044.11576},
     url = {http://geodesic.mathdoc.fr/item/IM_1995__121_3_144297/}
}