@article{MZ_1956__66_169616,
     author = {Angus E. Taylor},
     title = {Extensions of a {Theorem} of {Hellinger} and {Toeplitz.}},
     journal = {Mathematische Zeitschrift},
     pages = {53--57},
     publisher = {mathdoc},
     volume = {66},
     year = {1956},
     zbl = {0072.13201},
     url = {http://geodesic.mathdoc.fr/item/MZ_1956__66_169616/}
}