@article{CMFD_2013_49_a3,
     author = {A. Yu. Popov},
     title = {Development of the {Valiron--Levin} theorem on the least possible type of entire functions with a~given upper $\rho$-density of roots},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {132--164},
     publisher = {mathdoc},
     volume = {49},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2013_49_a3/}
}