@article{DAN_1989_309_2_a7,
     author = {V. B. Trushin},
     title = {On the solution of some nonlinear equations and variational},
     journal = {Doklady Akademii Nauk},
     pages = {289--292},
     publisher = {mathdoc},
     volume = {309},
     number = {2},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_309_2_a7/}
}