@article{MAN_1980__247_163356,
     author = {Albrecht Pietsch},
     title = {Weyl {Numbers} and {Eigenvalues} of {Operators} in {Banach} {Spaces.}},
     journal = {Mathematische Annalen},
     pages = {149--168},
     publisher = {mathdoc},
     volume = {247},
     year = {1980},
     zbl = {0428.47027},
     url = {http://geodesic.mathdoc.fr/item/MAN_1980__247_163356/}
}