@article{1256046795, author = {Waterhouse, William C.}, title = {Polynomial group laws over valuation rings}, journal = {Illinois J. Math.}, volume = {26}, number = {4}, year = {1982}, pages = { 252-256}, language = {en}, url = {http://dml.mathdoc.fr/item/1256046795} }
Waterhouse, William C. Polynomial group laws over valuation rings. Illinois J. Math., Tome 26 (1982) no. 4, pp. 252-256. http://gdmltest.u-ga.fr/item/1256046795/