@article{MS2_1956__4_165621,
     author = {FR. FABRICIUS-BJERRE},
     title = {Solution of problem 15 {(Vol.} 3 (1955), p. 306)},
     journal = {Mathematica Scandinavica},
     pages = {174--176},
     publisher = {mathdoc},
     volume = {4},
     year = {1956},
     url = {http://geodesic.mathdoc.fr/item/MS2_1956__4_165621/}
}