@article{DE_1977_13_10_a6,
     author = {Yu. A. Melentsova},
     title = {A non-improvable estimate of the interval of disconjugacy for a linear differential equation with coefficients that are bounded in $L_r$},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1776--1786},
     publisher = {mathdoc},
     volume = {13},
     number = {10},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_10_a6/}
}