Two-dimensional formal groups: from isomorphism to isogeny.
Kneppers, Harry A.W.M.
Mathematische Zeitschrift, Tome 205 (1990), p. 309-314 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1990-01-01
EUDML-ID : urn:eudml:doc:174176 
@article{GDZPPN002437988,
     title = {Two-dimensional formal groups: from isomorphism to isogeny.},
     journal = {Mathematische Zeitschrift},
     volume = {205},
     year = {1990},
     pages = {309-314},
     zbl = {0685.14025},
     url = {http://dml.mathdoc.fr/item/GDZPPN002437988}
}

Kneppers, Harry A.W.M. Two-dimensional formal groups: from isomorphism to isogeny.. Mathematische Zeitschrift, Tome 205 (1990) pp. 309-314. http://gdmltest.u-ga.fr/item/GDZPPN002437988/