@article{VMUMM_1987_4_a3,
     author = {Nguen Min' Chi},
     title = {Asymptotic behavior of the eigenvalues and eigenfunctions of boundary value problems in a domain with a small opening},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {17--20},
     publisher = {mathdoc},
     number = {4},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1987_4_a3/}
}