@article{MAN_1971__191_162143,
     author = {J.R. HOLUB},
     title = {Diagonal {Nuclear} {Maps} in {Sequence} {Spaces.}},
     journal = {Mathematische Annalen},
     pages = {326--332},
     publisher = {mathdoc},
     volume = {191},
     year = {1971},
     zbl = {0202.13201},
     url = {http://geodesic.mathdoc.fr/item/MAN_1971__191_162143/}
}