@article{05014464,
title = {A question of Sierpinski on triangular numbers.},
journal = {Integers},
volume = {5},
year = {2005},
zbl = {1130.11013},
language = {en},
url = {http://dml.mathdoc.fr/item/05014464}
}
Bennett, Michael A. A question of Sierpinski on triangular numbers.. Integers, Tome 5 (2005) . http://gdmltest.u-ga.fr/item/05014464/