@article{AM2_1985__29_137101,
     author = {C. Praagman},
     title = {Iterations and logarithms of formal automorphisms. {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {313--314},
     publisher = {mathdoc},
     volume = {29},
     year = {1985},
     zbl = {0595.13016},
     url = {http://geodesic.mathdoc.fr/item/AM2_1985__29_137101/}
}