@article{ELMA_1988__43_3_141437,
     author = {J. Steinig and P. Schumer},
     title = {On the incongruence of consecutive fourth powers.},
     journal = {Elemente der Mathematik},
     pages = {145--149},
     publisher = {mathdoc},
     volume = {43},
     number = {3},
     year = {1988},
     zbl = {0712.11002},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1988__43_3_141437/}
}