@article{DAN_1962_142_5_a16,
     author = {A. L. Teptin},
     title = {On the sign of the {Green's} function of a linear difference boundary-value problem of second order},
     journal = {Doklady Akademii Nauk},
     pages = {1038--1039},
     publisher = {mathdoc},
     volume = {142},
     number = {5},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_142_5_a16/}
}