@article{MAT_1973_17_1_a4,
     author = {J. S. Cassels},
     title = {Some elliptic function identities},
     journal = {Matematika},
     pages = {149--161},
     year = {1973},
     volume = {17},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1973_17_1_a4/}
}