@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/