@article{05074585,
title = {Canonical and filling subgroups of formal groups.},
journal = {The New York Journal of Mathematics [electronic only]},
volume = {12},
year = {2006},
pages = {235-247},
zbl = {1118.14054},
language = {en},
url = {http://dml.mathdoc.fr/item/05074585}
}
Schmitz, David J. Canonical and filling subgroups of formal groups.. The New York Journal of Mathematics [electronic only], Tome 12 (2006) pp. 235-247. http://gdmltest.u-ga.fr/item/05074585/