中国科学院数学与系统科学研究院期刊网
Linearized Oscillations for First Order Delay Differential Equations in a Critical State
Xian Hua TANG(1),Jian She YU(2
Acta Mathematica Sinica, Chinese Series . 2000, (2): 349 -358 .  DOI: 10.12386/A2000sxxb0047