@article{01641527,
title = {Improved inclusion-exclusion inequalities for simplex and orthant arrangements.},
journal = {JIPAM. Journal of Inequalities in Pure \& Applied Mathematics [electronic only]},
volume = {2},
year = {2001},
zbl = {0984.52011},
language = {en},
url = {http://dml.mathdoc.fr/item/01641527}
}
Naiman, Daniel Q.; Wynn, Henry P. Improved inclusion-exclusion inequalities for simplex and orthant arrangements.. JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only], Tome 2 (2001) . http://gdmltest.u-ga.fr/item/01641527/