中国科学院数学与系统科学研究院期刊网
OSCILLATION OF SOLUTIONS OF DELAY HYPERBOLIC DIFFERENTIAL EQUATIONS
CUI BAOTONG, YU YUANHONG, LIN SHIZHONG
Acta Mathematicae Applicatae Sinica . 1996, (1): 80 -88 .  DOI: 10.12387/C1996012