@article{MAN_1968__179_161766,
     author = {E. KR\"ATZEL},
     title = {Bemerkungen zu einem {Gitterpunktsproblem.}},
     journal = {Mathematische Annalen},
     pages = {90--96},
     year = {1968},
     volume = {179},
     url = {http://geodesic.mathdoc.fr/item/MAN_1968__179_161766/}
}