@article{JRAM_1988__388_153034,
     author = {Siegmund Kosarew},
     title = {Ein allgemeines {Kriterium} f\"ur das formale {Prinzip.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {18--39},
     publisher = {mathdoc},
     volume = {388},
     year = {1988},
     zbl = {0653.14002},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1988__388_153034/}
}