@article{IM_1990__101_2_143803,
     author = {M. Ram Murty and Rajiv Gupta},
     title = {Cyclicity and generation of points mod p on elliptic curves.},
     journal = {Inventiones mathematicae},
     pages = {225--236},
     publisher = {mathdoc},
     volume = {101},
     number = {2},
     year = {1990},
     zbl = {0731.14011},
     url = {http://geodesic.mathdoc.fr/item/IM_1990__101_2_143803/}
}