@article{1183534739, author = {Cox, Lawrence}, title = {Formal $A$-modules}, journal = {Bull. Amer. Math. Soc.}, volume = {79}, number = {5}, year = {1973}, pages = { 690-694}, language = {en}, url = {http://dml.mathdoc.fr/item/1183534739} }
Cox, Lawrence. Formal $A$-modules. Bull. Amer. Math. Soc., Tome 79 (1973) no. 5, pp. 690-694. http://gdmltest.u-ga.fr/item/1183534739/