@article{JRAM_1996__476_153831,
     author = {Peter Borwein and Tam\'as Erd\'elyi},
     title = {A sharp {Bernstein-type} inequality for exponential sums.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {127--142},
     publisher = {mathdoc},
     volume = {476},
     year = {1996},
     zbl = {0851.41011},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1996__476_153831/}
}