@article{DAN_1987_296_5_a6,
     author = {I. L. Sofronov},
     title = {A new method for the numerical solution of regular elliptic},
     journal = {Doklady Akademii Nauk},
     pages = {1057--1061},
     publisher = {mathdoc},
     volume = {296},
     number = {5},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_296_5_a6/}
}