@article{DE_1984_20_7_a17,
     author = {N. Yu. Orlov},
     title = {Phase method of determination of eigenvalues for the {Dirac} equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1253--1258},
     publisher = {mathdoc},
     volume = {20},
     number = {7},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_7_a17/}
}