@article{MOMA_1969__73_177462,
     author = {A.M. Fink and D.F.St. Mary},
     title = {A {Generalized} {Sturm} {Comparison} {Theorem} and {Oscillation} {Coefficients.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {207--212},
     publisher = {mathdoc},
     volume = {73},
     year = {1969},
     zbl = {0182.12301},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1969__73_177462/}
}