@article{IVM_1991_11_a10,
     author = {S. Ya. Serovaǐskiǐ},
     title = {Approximate conditions for optimality for a~system described by a~nonlinear parabolic equation},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {52--60},
     publisher = {mathdoc},
     number = {11},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1991_11_a10/}
}