@article{DE_1985_21_5_a3,
     author = {N. L. Korshikova},
     title = {Zeros of solutions of a class of $n$th order linear equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {757--764},
     publisher = {mathdoc},
     volume = {21},
     number = {5},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_5_a3/}
}