@article{01376190,
title = {On the iterates of the sum of exponential divisors.},
journal = {Mathematica Pannonica},
volume = {10},
year = {1999},
pages = {153-158},
zbl = {0929.11035},
language = {en},
url = {http://dml.mathdoc.fr/item/01376190}
}
Kátai, I.; Subbarao, M.V. On the iterates of the sum of exponential divisors.. Mathematica Pannonica, Tome 10 (1999) pp. 153-158. http://gdmltest.u-ga.fr/item/01376190/