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5. G. G. Braichev and V. B. Sherstyukov, “On the least possible type of entire functions of order ρ ∈ (0, 1) with positive zeros,” Izv. Akad. Nauk SSSR Ser. Mat. 75 (1), 3–28 (2011) [Izv. Math. 75 (1), 1–27 (2011)].