%0 Journal Article %A A. D. Wentzel' %T On the asymptotic behaviour of the first eigenvalue of a~second-order differential operator with small parameter by the higher derivatives %J Teoriâ veroâtnostej i ee primeneniâ %D 1975 %P 610-613 %V 20 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TVP_1975_20_3_a9/ %G ru %F TVP_1975_20_3_a9