中国科学院数学与系统科学研究院期刊网
Inequalities Among Eigenvalues Between Indefinite and Definite Sturm-Liouville Problems
Guang Sheng WEI, Zong Ben XU
Acta Mathematica Sinica, Chinese Series . 2005, (4): 773 -780 .  DOI: 10.12386/A2005sxxb0093