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Cao Ting-Bin; Liu Kai; Xu Hong-Yan: Bounds for the sums of zeros of solutions of u(m) = P(z)u where P is a polynomial. (2011)
Cao Ting-Bin; Li Lei-Min: Oscillation results on meromorphic solutions of second order differential equations in the complex plane. (2010)
Xu Hong-Yan; Cao Ting-Bin: Oscillation of solutions of some higher order linear differential equations. (2009)