@article{RM_1988_43_5_a23,
     author = {A. Yu. Levin},
     title = {A~criterion for absolute disconjugate stability for $n$th-order equations},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {244--245},
     publisher = {mathdoc},
     volume = {43},
     number = {5},
     year = {1988},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1988_43_5_a23/}
}