@article{10_4153_CMB_1969_078_9,
     author = {Erbe, Lynn},
     title = {Disconjugacy {Conditions} for the {Third} {Order} {Linear} {Differential} {Equation}},
     journal = {Canadian mathematical bulletin},
     pages = {603--613},
     year = {1969},
     volume = {12},
     number = {5},
     doi = {10.4153/CMB-1969-078-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-078-9/}
}