中国综合性科技类核心期刊(北大核心)
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中文
Positive Solutions for an
n
th-Order Delay Differential Equation(English)
LU Qiu-ying;ZHU De-ming
Journal of East China Normal University(Natural Science) . 2007, (
5
): 20 -33 .
中国综合性科技类核心期刊(北大核心)