@article{DAN_1981_258_3_a5,
     author = {N. La\v{z}eti\'c},
     title = {Estimates of the eigenfunctions and associated functions of a {Sturm--Liouville} operator with discontinuous coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {541--544},
     publisher = {mathdoc},
     volume = {258},
     number = {3},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_258_3_a5/}
}