@article{bwmeta1.element.bwnjournal-article-fmv32i1p3bwm, author = {Hans Fried}, title = {\"Uber projektive Funktionen}, journal = {Fundamenta Mathematicae}, volume = {32}, year = {1939}, pages = {33-44}, zbl = {0021.30204}, language = {deu}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv32i1p3bwm} }
Fried, Hans. Über projektive Funktionen. Fundamenta Mathematicae, Tome 32 (1939) pp. 33-44. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv32i1p3bwm/