@article{VMUMM_1993_4_a9,
     author = {V. Ya. Yakubov},
     title = {Nonclassical two-sided sharp estimates for normalized eigenfunctions of the {Sturm--Liouville} problem},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {37--44},
     publisher = {mathdoc},
     number = {4},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1993_4_a9/}
}