@article{AM2_1984__27_137030,
     author = {H. Berens and L. Hetzelt},
     title = {Die {Metrische} {Struktur} der {Sonnen} in l...(n).},
     journal = {Aequationes mathematicae},
     pages = {274--287},
     publisher = {mathdoc},
     volume = {27},
     year = {1984},
     zbl = {0544.41025},
     url = {http://geodesic.mathdoc.fr/item/AM2_1984__27_137030/}
}