@article{GDZPPN002344149,
title = {Problem 16},
journal = {Mathematica Scandinavica},
volume = {3},
year = {1955},
pages = {306-306},
url = {http://dml.mathdoc.fr/item/GDZPPN002344149}
}
PLEIJEL, ARNE. Problem 16. Mathematica Scandinavica, Tome 3 (1955) p. 306. http://gdmltest.u-ga.fr/item/GDZPPN002344149/