@article{AM2_1986__30_137115,
     author = {Gy\"orgy Szab\'o},
     title = {On mappings, orthogonally additive in the {Birkhoff-James} sense.},
     journal = {Aequationes mathematicae},
     pages = {93--105},
     publisher = {mathdoc},
     volume = {30},
     year = {1986},
     zbl = {0594.39007},
     url = {http://geodesic.mathdoc.fr/item/AM2_1986__30_137115/}
}