Written:
    1.   pdf   (with A. Eremenko) "On the spherical derivative of a rational function." January 2012.

Submitted:

Accepted:

Printed:
    1.   pdf   (with A. Eremenko) "Generalization of a Theorem of Clunie and Hayman." Proc. Amer. Math. Soc., 140, (2012) 1397-1402.