%0 Journal Article %A A. A. Arkhipova %T Quasilinear elliptic and parabolic systems with nondiagonal principal matrices and strong nonlinearities in the gradient. Solvability and regularity problems %J Contemporary Mathematics. Fundamental Directions %D 2023 %P 18-31 %V 69 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMFD_2023_69_1_a1/ %G ru %F CMFD_2023_69_1_a1