@article{DAN_1991_317_2_a11,
     author = {V. S. Mel'nik},
     title = {Some properties of solutions of operator equations and variational},
     journal = {Doklady Akademii Nauk},
     pages = {304--308},
     year = {1991},
     volume = {317},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_317_2_a11/}
}