@article{MZM_2000_68_1_a14,
     author = {A. V. D'yachenko},
     title = {Asymptotics of the eigenvalues of an indefinite {Sturm--Liouville} problem},
     journal = {Matemati\v{c}eskie zametki},
     pages = {139--143},
     publisher = {mathdoc},
     volume = {68},
     number = {1},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2000_68_1_a14/}
}