@article{GDZPPN002027402,
title = {Very Slowly Varying Functions.},
journal = {Aequationes mathematicae},
volume = {10},
year = {1974},
pages = {1-9},
zbl = {0273.26001},
url = {http://dml.mathdoc.fr/item/GDZPPN002027402}
}
Erdös, P.; Ash, J. Marshall; Rubel, L.A. Very Slowly Varying Functions.. Aequationes mathematicae, Tome 10 (1974) pp. 1-9. http://gdmltest.u-ga.fr/item/GDZPPN002027402/