中国科学院数学与系统科学研究院期刊网
The Distribution of Zeros for Differential Polynomials f~kQ[f] + P[f]
Xiao Ping ZHAN(1),Hai Tao CAI(
Acta Mathematica Sinica, Chinese Series . 2003, (2): 237 -244 .  DOI: 10.12386/A2003sxxb0031