@article{GDZPPN002343444, title = {Problem 9}, journal = {Mathematica Scandinavica}, volume = {2}, year = {1954}, pages = {345-345}, url = {http://dml.mathdoc.fr/item/GDZPPN002343444} }
CHUNG, K.L. Problem 9. Mathematica Scandinavica, Tome 2 (1954) p. 345. http://gdmltest.u-ga.fr/item/GDZPPN002343444/