@article{DE_1983_19_11_a30,
     author = {O. A. Plaksina},
     title = {Asymptotic formulas for the spectrum of certain {Sturm--Liouville} boundary value problems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2009--2011},
     publisher = {mathdoc},
     volume = {19},
     number = {11},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_11_a30/}
}