@article{TM_1987_180_a105,
     author = {O. A. Plaksina},
     title = {Asymptotic formulas for the spectrum of a~class of {Sturm{\textendash}Liouville} boundary value problems},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {177--178},
     year = {1987},
     volume = {180},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1987_180_a105/}
}