3) M. Barrett and A. Eremenko.  "Generalization of a Theorem of Clunie
and Hayman."  Proceedings of the American Mathematical Society, 140,
(2012) 1397-1402. <br><br>

2) A. Eremenko and L. Rubel.  "On the zero sets of certain entire
functions."  Proceedings of the American Mathematical Society, 124, 8
(1996), 2401-2404. <br><br>

2) A. Eremenko and L. Rubel.  "The arithmetic of entire functions
under composition."  Adv. Math., 124, 2 (1996), 334-354. <br><br>

1) Ash, J. Marshall; Erdos, P.; Rubel, L.A.  "Very slowly varying
functions."  Aequationes Math. 10 (1974), 1-9. <br><br>

1) Erdos, P.; Gordon, B.; Rubel, L.A.; Straus, E.G.  "Tauberian
theorems for sum sets."  Acta Arith. 9 (1964) 177-189. <br><br>