%0 Journal Article %A L. N. Krivonosov %A V. A. Lukyanov %T Duality equations on a 4-manifold of conformal torsion-free connection and some of their solutions for the zero signature %J Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences %D 2019 %P 207-228 %V 23 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/VSGTU_2019_23_2_a0/ %G ru %F VSGTU_2019_23_2_a0