@article{02124065,
title = {A combinatorial approach to hyperharmonic numbers.},
journal = {Integers},
volume = {3},
year = {2003},
zbl = {1128.11309},
language = {en},
url = {http://dml.mathdoc.fr/item/02124065}
}
Benjamin, Arthur T.; Gaebler, David; Gaebler, Robert. A combinatorial approach to hyperharmonic numbers.. Integers, Tome 3 (2003) . http://gdmltest.u-ga.fr/item/02124065/