@article{AM2_1969__2_182328,
     author = {M. HOSSZ\"U},
     title = {A {Remark} on the {Square} {Norm}},
     journal = {Aequationes mathematicae},
     pages = {190--193},
     publisher = {mathdoc},
     volume = {2},
     year = {1969},
     zbl = {0174.46302},
     url = {http://geodesic.mathdoc.fr/item/AM2_1969__2_182328/}
}