@article{IM2_1971_5_2_a2,
     author = {V. A. Dem'yanenko},
     title = {Torsion of  elliptic curves},
     journal = {Izvestiya. Mathematics },
     pages = {289--318},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1971_5_2_a2/}
}