中国科学院数学与系统科学研究院期刊网
ON THE EQUIVALENCE PROBLEM OF DIFFERENTIAL EQUATIONS AND DIFFERENCE-DIFFERENTIAL EQUATIONS IN THE THEORY OF STABILITY
秦元勋;刘永清;王联
Acta Mathematica Sinica, Chinese Series . 1959, (3): 333 -363 .  DOI: 10.12386/A1959sxxb0033