@article{JRAM_1972__256_151249,
     author = {G. Frey},
     title = {Elliptische {Funktionenk\"orper} mit schlechter {Reduktion.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {71--106},
     publisher = {mathdoc},
     volume = {256},
     year = {1972},
     zbl = {0241.14023},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1972__256_151249/}
}