@article{AM2_1979__19_136809,
     author = {L. Reich and J. Schwaiger},
     title = {\"Uber die {Funktionengleichung} {N?T} = {T?M} f\"ur formale {Potenzreihen.}},
     journal = {Aequationes mathematicae},
     pages = {66--78},
     publisher = {mathdoc},
     volume = {19},
     year = {1979},
     zbl = {0442.16031},
     url = {http://geodesic.mathdoc.fr/item/AM2_1979__19_136809/}
}