@article{DE_1997_33_1_a15,
     author = {N. Yu. Kapustin and E. I. Moiseev},
     title = {On spectral problems with a spectral parameter in the boundary condition},
     journal = {Differencialʹnye uravneni\^a},
     pages = {115--119},
     publisher = {mathdoc},
     volume = {33},
     number = {1},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_1_a15/}
}