@article{00772743,
title = {Divisor problems in special sets of positive integers.},
journal = {Acta Mathematica Universitatis Comenianae. New Series},
volume = {61},
year = {1992},
pages = {101-115},
zbl = {0823.11051},
language = {en},
url = {http://dml.mathdoc.fr/item/00772743}
}
Nowak, W.G. Divisor problems in special sets of positive integers.. Acta Mathematica Universitatis Comenianae. New Series, Tome 61 (1992) pp. 101-115. http://gdmltest.u-ga.fr/item/00772743/