@article{DAN_1984_278_6_a3,
     author = {N. A. Luk'yanov},
     title = {An a posteriori estimate of the accuracy of solutions of boundary value problems},
     journal = {Doklady Akademii Nauk},
     pages = {1301--1305},
     publisher = {mathdoc},
     volume = {278},
     number = {6},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_278_6_a3/}
}