@article{MS2_1954__2_165556,
     author = {K.L. CHUNG},
     title = {Problem 9},
     journal = {Mathematica Scandinavica},
     pages = {345--345},
     publisher = {mathdoc},
     volume = {2},
     year = {1954},
     url = {http://geodesic.mathdoc.fr/item/MS2_1954__2_165556/}
}