Supported by the National Natural Science Foundation of Education Department of Sichuan Province(2002A031); Supported by the “11.5” Research and Study Programs of SWUST(06zx2116); Supported by the National Natural Science Foundation of China(10271122);
LU Qian, GU Yong-xing. Zeros of Differential Polynomial f(z)f(k)(z) − a and Its Normality[J]. Chinese Quarterly Journal of Mathematics, 2009, 24(1): 75-80.