@article{2303,
author = {Al-Salam, W.A. and Carlitz, L.},
title = {Generalized Tur\'an expressions for certain hypergeometric series},
journal = {Portugaliae mathematica},
volume = {16},
year = {1957},
pages = {119-127},
zbl = {0089.04503},
mrnumber = {0098855},
language = {en},
url = {http://dml.mathdoc.fr/item/2303}
}
Al-Salam, W.A.; Carlitz, L. Generalized Turán expressions for certain hypergeometric series. Portugaliae mathematica, Tome 16 (1957) pp. 119-127. http://gdmltest.u-ga.fr/item/2303/