%0 Journal Article %A I. N. Maǐboroda %T On the construction of lower and upper functions for a boundary value problem of a system of second-order nonlinear parabolic equations %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1986 %P 51-55 %N 12 %U http://geodesic.mathdoc.fr/item/IVM_1986_12_a10/ %G ru %F IVM_1986_12_a10