@article{05548951,
title = {Necessary and sufficient conditions for joint lower and upper estimates.},
journal = {JIPAM. Journal of Inequalities in Pure \& Applied Mathematics [electronic only]},
volume = {10},
year = {2009},
zbl = {1173.40001},
language = {en},
url = {http://dml.mathdoc.fr/item/05548951}
}
Leindler, Laszlo. Necessary and sufficient conditions for joint lower and upper estimates.. JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only], Tome 10 (2009) . http://gdmltest.u-ga.fr/item/05548951/