@article{10_4153_CJM_1969_023_9,
     author = {Lavie, Meira},
     title = {The {Schwarzian} {Derivative} and {Disconjugacy} of nth order {Linear} {Differential} {Equations}},
     journal = {Canadian journal of mathematics},
     pages = {235--249},
     year = {1969},
     volume = {21},
     number = {1},
     doi = {10.4153/CJM-1969-023-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-023-9/}
}