@article{JRAM_1988__385_153009,
     author = {Robert Coleman and William McCallum},
     title = {Stable reduction of {Fermat} curves and {Jacobi} sum {Hecke} characters.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {41--101},
     publisher = {mathdoc},
     volume = {385},
     year = {1988},
     zbl = {0654.12003},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1988__385_153009/}
}