@article{DAN_1975_221_5_a12,
     author = {L. Ya. Shlyapochnik},
     title = {On coercive difference approximations of a problem with oblique derivative},
     journal = {Doklady Akademii Nauk},
     pages = {1053--1055},
     publisher = {mathdoc},
     volume = {221},
     number = {5},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_221_5_a12/}
}