@article{MS2_1968__22_251807,
     author = {W. Ljunggren},
     title = {A {Remark} {Concerning} the {Paper} },
     journal = {Mathematica Scandinavica},
     pages = {282--282},
     publisher = {mathdoc},
     volume = {22},
     year = {1968},
     zbl = {0182.06903},
     url = {http://geodesic.mathdoc.fr/item/MS2_1968__22_251807/}
}