@article{MAN_1992__294_4_165014,
     author = {William G. McCallum},
     title = {The arithmetic of {Fermat} curves.},
     journal = {Mathematische Annalen},
     pages = {503--512},
     publisher = {mathdoc},
     volume = {294},
     number = {4},
     year = {1992},
     zbl = {0766.14013},
     url = {http://geodesic.mathdoc.fr/item/MAN_1992__294_4_165014/}
}