著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI)
,Oscillation criteria for second order differential equations with positive and negative coefficients,Applied Mathematics and Computation 181,,,2006,,,853-863,https://cir.nii.ac.jp/crid/1010282256867445635,