@article{MAN_1967__174_161632,
     author = {S. SIMONS},
     title = {Krein's {Theorem} without {Sequential} {Convergence.}},
     journal = {Mathematische Annalen},
     pages = {157--162},
     publisher = {mathdoc},
     volume = {174},
     year = {1967},
     zbl = {0152.32303},
     url = {http://geodesic.mathdoc.fr/item/MAN_1967__174_161632/}
}