@article{JRAM_1962__211_150543,
     author = {Leon Bernstein},
     title = {Zur {L\"osung} der diopantischen {Gleichung} ..., insbesondere im {Fall} m = 4.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {1--10},
     publisher = {mathdoc},
     volume = {211},
     year = {1962},
     zbl = {0106.03601},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1962__211_150543/}
}