@article{MS2_1955__3_165589,
     author = {O. KOLBERG},
     title = {\"Uber ein {Problem} von {Viggo} {Brun}},
     journal = {Mathematica Scandinavica},
     pages = {221--223},
     publisher = {mathdoc},
     volume = {3},
     year = {1955},
     zbl = {0068.27303},
     url = {http://geodesic.mathdoc.fr/item/MS2_1955__3_165589/}
}