@article{SM_1994_78_1_a2,
     author = {M. F. Sukhinin},
     title = {On three principles of solvability of operator equations},
     journal = {Sbornik. Mathematics},
     pages = {35--46},
     publisher = {mathdoc},
     volume = {78},
     number = {1},
     year = {1994},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1994_78_1_a2/}
}