@article{MAN_1976__220_162813,
     author = {Noboru Suzuki},
     title = {On the {Convergence} of {Neumann} {Series} in {Banach} {Spaces.}},
     journal = {Mathematische Annalen},
     pages = {143--146},
     publisher = {mathdoc},
     volume = {220},
     year = {1976},
     zbl = {0304.47016},
     url = {http://geodesic.mathdoc.fr/item/MAN_1976__220_162813/}
}