Saouter, Yannick; Gourdon, Xavier; Demichel, Patrick (2011). “An improved lower bound for the de Bruijn-Newman constant”. 《Mathematics of Computation》 80 (276): 2281–2287. doi:10.1090/S0025-5718-2011-02472-5. MR2813360.
doi.org
dx.doi.org
Saouter, Yannick; Gourdon, Xavier; Demichel, Patrick (2011). “An improved lower bound for the de Bruijn-Newman constant”. 《Mathematics of Computation》 80 (276): 2281–2287. doi:10.1090/S0025-5718-2011-02472-5. MR2813360.