@article{CM_1979__38_3_277_0,
     author = {Hazewinkel, Michiel},
     title = {Constructing formal groups. {VIII.} {Formal} $A$-modules},
     journal = {Compositio Mathematica},
     pages = {277--291},
     publisher = {Sijthoff et Noordhoff International Publishers},
     volume = {38},
     number = {3},
     year = {1979},
     mrnumber = {535071},
     zbl = {0402.14017},
     language = {en},
     url = {http://www.numdam.org/item/CM_1979__38_3_277_0/}
}