@article{GDZPPN002107333,
title = {Estimating isogenies on elliptic curves.},
journal = {Inventiones mathematicae},
volume = {100},
year = {1990},
pages = {1-24},
zbl = {0722.14027},
url = {http://dml.mathdoc.fr/item/GDZPPN002107333}
}
Masser, D.W.; Wüstholz, G. Estimating isogenies on elliptic curves.. Inventiones mathematicae, Tome 100 (1990) pp. 1-24. http://gdmltest.u-ga.fr/item/GDZPPN002107333/