@article{1077473990,
author = {Friedrichs, K. O.},
title = {A theorem of Lichtenstein},
journal = {Duke Math. J.},
volume = {14},
number = {1},
year = {1947},
pages = { 67-82},
language = {en},
url = {http://dml.mathdoc.fr/item/1077473990}
}
Friedrichs, K. O. A theorem of Lichtenstein. Duke Math. J., Tome 14 (1947) no. 1, pp. 67-82. http://gdmltest.u-ga.fr/item/1077473990/