The problem on the minimal type of entire functions of order $\rho\in(0,1)$ with positive zeroes of prescribed densities and step
Ufa mathematical journal, Tome 7 (2015) no. 4, pp. 140-148

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We consider the problem on the least possible type of entire functions of order $\rho\in(0,1)$, whose zeroes lie on a ray and have prescribed densities and step. We prove the exactness of the estimate obtained previously by the author for the type of these functions. We provide a detailed justification for the construction of the extremal entire function in this problem.
Keywords: type of an entire function, upper, lower densities and step of sequence of zeroes, extremal problem.
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     author = {O. V. Sherstyukova},
     title = {The problem on the minimal type of entire functions of order $\rho\in(0,1)$ with positive zeroes of prescribed densities and step},
     journal = {Ufa mathematical journal},
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O. V. Sherstyukova. The problem on the minimal type of entire functions of order $\rho\in(0,1)$ with positive zeroes of prescribed densities and step. Ufa mathematical journal, Tome 7 (2015) no. 4, pp. 140-148. http://geodesic.mathdoc.fr/item/UFA_2015_7_4_a12/