Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1990_48_5_a15, author = {S. M. Barkar'}, title = {Eigenvalues of a~boundary value problem in the open right half-plane}, journal = {Matemati\v{c}eskie zametki}, pages = {138--140}, publisher = {mathdoc}, volume = {48}, number = {5}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1990_48_5_a15/} }
S. M. Barkar'. Eigenvalues of a~boundary value problem in the open right half-plane. Matematičeskie zametki, Tome 48 (1990) no. 5, pp. 138-140. http://geodesic.mathdoc.fr/item/MZM_1990_48_5_a15/