@article{05171560,
title = {On the irrationality of a divisor function series.},
journal = {Integers},
volume = {7},
year = {2007},
zbl = {1123.11022},
language = {en},
url = {http://dml.mathdoc.fr/item/05171560}
}
Friedlander, John B.; Luca, Florian; Stoiciu, Mihai. On the irrationality of a divisor function series.. Integers, Tome 7 (2007) . http://gdmltest.u-ga.fr/item/05171560/