@article{DAN_1991_319_4_a4,
     author = {M. M. Gekhtman (jr.)},
     title = {On estimates for normalized eigenfunctions of the {Sturm{\textendash}Liouville} operator with nonsmooth coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {798--800},
     year = {1991},
     volume = {319},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_319_4_a4/}
}