@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/