@article{10_4153_CMB_1984_017_5,
     author = {Johnson, George W. and Yan, Jurang},
     title = {An {Improved} {Wintner} {Oscillation} {Criterion} for {Second} {Order} {Linear} {Differential} {Equations}},
     journal = {Canadian mathematical bulletin},
     pages = {117--121},
     year = {1984},
     volume = {27},
     number = {1},
     doi = {10.4153/CMB-1984-017-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1984-017-5/}
}