@article{DE_2000_36_6_a13,
     author = {A. Yu. Teplinskii},
     title = {Asymptotic expansions for the eigenvalues and the eigenfunctions of boundary value problems 
},
     journal = {Differencialʹnye uravneni\^a},
     pages = {822--828},
     publisher = {mathdoc},
     volume = {36},
     number = {6},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2000_36_6_a13/}
}