@article{ELMA_1956__11_140652,
     author = {Arp\'ad Szab\'o},
     title = {Ein {Lehrsatz} der pythagoreischen {Arithmetik.}},
     journal = {Elemente der Mathematik},
     pages = {101--105},
     publisher = {mathdoc},
     volume = {11},
     year = {1956},
     zbl = {0070.00302},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1956__11_140652/}
}