@article{AM2_1971__6_136205,
     author = {GOLA.B.S.},
     title = {On a {Problem} of the {Angular} {Metric} in {Minkowskian} {Spaces} {(Sur} un probleme de la metrique angulaire dans  la geom\'etrie de {Minkowski)} {(Short} {Communication)}},
     journal = {Aequationes mathematicae},
     pages = {311--312},
     publisher = {mathdoc},
     volume = {6},
     year = {1971},
     url = {http://geodesic.mathdoc.fr/item/AM2_1971__6_136205/}
}