%0 Journal Article %A I. V. Kolesnikova %A Yu. I. Sapronov %T Two-mode branching of ferroelectric phase heterogeneous crystals of singular phase of the sixth order %J Vestnik Chelyabinskogo Gosudarstvennogo Universiteta. Matematika, Mekhanika, Informatika %D 2009 %P 37-47 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/VCHGU_2009_11_a3/ %G ru %F VCHGU_2009_11_a3