@article{VMUMM_2009_3_a2,
     author = {S. I. Mitrokhin},
     title = {The asymptotics of the eigenvalues of a fourth order differential operator with summable coefficients},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {14--17},
     publisher = {mathdoc},
     number = {3},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2009_3_a2/}
}