@article{GDZPPN001181858, title = {A Lower Bound for the de Bruijn-Newman Constant ... .}, journal = {Numerische Mathematik}, volume = {55}, year = {1987}, pages = {483-498}, zbl = {0663.65017}, url = {http://dml.mathdoc.fr/item/GDZPPN001181858} }
Varga, R.S.; Csordas, G.; Norfolk, T.S. A Lower Bound for the de Bruijn-Newman Constant ... .. Numerische Mathematik, Tome 55 (1987) pp. 483-498. http://gdmltest.u-ga.fr/item/GDZPPN001181858/