@article{DE_1986_22_4_a9,
     author = {R. R. Gadyl'shin},
     title = {Asymptotics of the eigenvalue of a singularly perturbed selfadjoint elliptic problem with a small parameter in the boundary conditions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {640--652},
     publisher = {mathdoc},
     volume = {22},
     number = {4},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_4_a9/}
}