@article{IVM_2005_12_a5,
     author = {S. Ya. Serovaǐskiǐ},
     title = {A~control problem in coefficients and an extended derivative with respect to a~convex set},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {46--55},
     publisher = {mathdoc},
     number = {12},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2005_12_a5/}
}