W. Bergweiler, A. Eremenko and J. Langley: Real entire functions of infinite order and a conjecture of Wiman, Geometric and Functional Analysis (GAFA), 13, 5 (2003), 975-991. and the now-proved Pólya-Wiman conjectureThomas Craven, George Csordas, Wayne Smith: The zeros of derivatives of entire functions and the Pólya-Wiman conjecture, Annals of Mathematics (2) 125, 1987, pp. 405–431 have inspired much research.
