On the smallness of a Paley–Wiener function near its integer zeroes
M. B. Dubashinskiy

References
1.	L. de Branges, Hilbert Spaces of Entire Functions, Prentice-Hall, Englewood Cliffs, 1968
2.	V. I. Smirnov, Kurs vysshei matematiki, v. 2, Nauka, M., 1974