@article{JRAM_1921__151_149502,
     author = {Adolf Fraenkel},
     title = {\"Uber einfache {Erweiterungen} zerlegbarer {Ringe.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {121--166},
     publisher = {mathdoc},
     volume = {151},
     year = {1921},
     zbl = {48.0123.01},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1921__151_149502/}
}