@article{10_4153_CMB_1965_031_0,
     author = {Burton, T. A.},
     title = {Some {General} {Instability} {Criteria} for {Ordinary} {Differential} {Equations}},
     journal = {Canadian mathematical bulletin},
     pages = {453--457},
     year = {1965},
     volume = {8},
     number = {4},
     doi = {10.4153/CMB-1965-031-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1965-031-0/}
}