@article{DAN_1974_216_6_a6,
     author = {G. Kh. Todorova},
     title = {Formal group laws for elliptic curves over a local field},
     journal = {Doklady Akademii Nauk},
     pages = {1229--1232},
     year = {1974},
     volume = {216},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_216_6_a6/}
}