@article{DE_1969_5_8_a17,
     author = {A. G. Ramm},
     title = {An investigation of the {Green's} function of a second order differential equation in regions with infinite boundary},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1509--1516},
     publisher = {mathdoc},
     volume = {5},
     number = {8},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_8_a17/}
}