@article{02000851,
title = {On Obl\'ath's problem.},
journal = {Journal of Integer Sequences [electronic only]},
volume = {6},
year = {2003},
zbl = {1040.11003},
language = {en},
url = {http://dml.mathdoc.fr/item/02000851}
}
Gica, Alexandru; Panaitopol, Laurenţiu. On Obláth's problem.. Journal of Integer Sequences [electronic only], Tome 6 (2003) . http://gdmltest.u-ga.fr/item/02000851/