%0 Journal Article %A G. Fichera %T On a unified theory of boundary value problems for elliptic-parabolic equations of second order %J Matematika %D 1963 %P 99-122 %V 7 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAT_1963_7_6_a4/ %G ru %F MAT_1963_7_6_a4