Bordulyak, M.T. and Sheremeta, M.M. (2003) “Boundedness of the l-Index of Laguerre–Pólya Entire Functions”, Ukrains’kyi Matematychnyi Zhurnal, 55(1), pp. 91–99. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3890 (Accessed: 6 December 2025).