%0 Journal Article %A Shanpeng Zeng %A Yan Yang %A Yuesheng Wu %T The improvement of the value distribution on $f+a(f')^{n}$ %J Kragujevac Journal of Mathematics %D 2011 %P 139 %V 35 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/KJM_2011_35_1_a10/ %G en %F KJM_2011_35_1_a10