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@article{AM_2000_152_1_a3, author = {Frans Oort}, title = {Newton polygons and formal groups: {Conjectures} by {Manin} and {Grothendieck}}, journal = {Annals of mathematics}, publisher = {mathdoc}, volume = {152}, number = {1}, year = {2000}, url = {http://geodesic.mathdoc.fr/item/AM_2000_152_1_a3/} }
Frans Oort. Newton polygons and formal groups: Conjectures by Manin and Grothendieck. Annals of mathematics, Tome 152 (2000) no. 1. http://geodesic.mathdoc.fr/item/AM_2000_152_1_a3/