@article{DAN_1963_148_2_a8,
     author = {A. I. Koshelev},
     title = {Involution transformations and the method of successive approximations for elliptic equations},
     journal = {Doklady Akademii Nauk},
     pages = {274--276},
     publisher = {mathdoc},
     volume = {148},
     number = {2},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_148_2_a8/}
}