@article{RM_1979_34_2_a21,
     author = {G. K. Zakharov},
     title = {The~contraction method for a~class of~admissible controls},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {251--252},
     publisher = {mathdoc},
     volume = {34},
     number = {2},
     year = {1979},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1979_34_2_a21/}
}