%0 Journal Article %A N. Lažetić %T Estimates of the eigenfunctions and associated functions of a Sturm--Liouville operator with discontinuous coefficients %J Doklady Akademii Nauk %D 1981 %P 541-544 %V 258 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_258_3_a5/ %G ru %F DAN_1981_258_3_a5