%0 Journal Article %A A. O. Smirnov %T A~matrix analogue of Appell's theorem and reductions of multidimensional Riemann theta-functions %J Sbornik. Mathematics %D 1988 %P 379-388 %V 61 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1988_61_2_a6/ %G en %F SM_1988_61_2_a6