@article{DAN_1993_331_2_a4,
     author = {V. Ya. Yakubov},
     title = {Sharp estimates for normalized eigenfunctions of the {Sturm{\textendash}Liouville} problem},
     journal = {Doklady Akademii Nauk},
     pages = {148--149},
     year = {1993},
     volume = {331},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1993_331_2_a4/}
}