@article{MOMA_1990__110_3-4_178497,
     author = {Stefan Geiss},
     title = {Some {Relations} {Between} {s-Numbers} of {Operators} on {Banach} {Spaces.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {217--230},
     publisher = {mathdoc},
     volume = {110},
     number = {3-4},
     year = {1990},
     zbl = {0727.47009},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1990__110_3-4_178497/}
}