@article{1256047609,
author = {Waterhouse, William C.},
title = {Commutative polynomial group laws over valuation rings},
journal = {Illinois J. Math.},
volume = {24},
number = {4},
year = {1980},
pages = { 408-411},
language = {en},
url = {http://dml.mathdoc.fr/item/1256047609}
}
Waterhouse, William C. Commutative polynomial group laws over valuation rings. Illinois J. Math., Tome 24 (1980) no. 4, pp. 408-411. http://gdmltest.u-ga.fr/item/1256047609/