@article{DAN_1982_264_6_a3,
     author = {Y. I. Bykova},
     title = {Estimates of the rate of convergence of projective-difference schemes for nonstationary problems with singularities in the coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {1297--1300},
     publisher = {mathdoc},
     volume = {264},
     number = {6},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1982_264_6_a3/}
}