中国科学院数学与系统科学研究院期刊网
ON THE STABILITY OF MOTION OF DYNAMICAL SYSTEMS WITH TIME-VARYING COEFFICIENTS
秦元勋;王联;王慕秋
Acta Mathematica Sinica, Chinese Series . 1978, (2): 176 -186 .  DOI: 10.12386/A1978sxxb0019