@article{TRSPY_1987_180_a105,
     author = {O. A. Plaksina},
     title = {Asymptotic formulas for the spectrum of a~class of {Sturm--Liouville} boundary value problems},
     journal = {Informatics and Automation},
     pages = {177--178},
     publisher = {mathdoc},
     volume = {180},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a105/}
}