@article{MOMA_1974__78_186346,
     author = {Michael Cernusca},
     title = {L\"osung der formalen {Potenzreihen} {eA} {eB} = {eX} und {eA+Bt} = {eAeX.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {4--14},
     publisher = {mathdoc},
     volume = {78},
     year = {1974},
     zbl = {0292.13010},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1974__78_186346/}
}