@article{MOMA_1975__79_177701,
     author = {Harro Walk},
     title = {Inverspositive {Operatoren} und {Taubers\"atze} in der {Erneuerungstheorie.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {333--346},
     publisher = {mathdoc},
     volume = {79},
     year = {1975},
     zbl = {0329.60057},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1975__79_177701/}
}