@article{05021985,
title = {On a class of densities of sets of positive integers.},
journal = {Acta Mathematica Universitatis Comenianae. New Series},
volume = {72},
year = {2003},
pages = {213-221},
zbl = {1087.11006},
language = {en},
url = {http://dml.mathdoc.fr/item/05021985}
}
Mačaj, M.; Mišík, L.; Šalát, T.; Tomanová, J. On a class of densities of sets of positive integers.. Acta Mathematica Universitatis Comenianae. New Series, Tome 72 (2003) pp. 213-221. http://gdmltest.u-ga.fr/item/05021985/