%0 Journal Article %A N. Lažetić %T Uniform estimates for derivatives of eigenfunctions of a selfadjoint Sturm--Liouville operator %J Differencialʹnye uravneniâ %D 1981 %P 1978-1983 %V 17 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1981_17_11_a5/ %G ru %F DE_1981_17_11_a5