%0 Journal Article %A S. I. Mitrokhin %T The asymptotics of the eigenvalues of a fourth order differential operator with summable coefficients %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2009 %P 14-17 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2009_3_a2/ %G ru %F VMUMM_2009_3_a2