@article{TM_1988_185_a2,
     author = {S. M. Aseev},
     title = {Surface set-valued functions and the integration of multivalued mappings},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {54--59},
     year = {1988},
     volume = {185},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1988_185_a2/}
}