中国科学院数学与系统科学研究院期刊网
Boundary Value Problems of the Higher Order Singular Ordinary Differential Equations (Ⅰ)──the Non-Degenerative Case
章熙康
Acta Mathematica Sinica, Chinese Series . 1996, (2):  .  DOI: 10.12386/A1996sxxb0022