%0 Journal Article %A S. S. Ryshkov %T On the heory of reduction of positive quadratic forms %J Zapiski Nauchnykh Seminarov POMI %D 1973 %P 37-64 %V 33 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1973_33_a2/ %G ru %F ZNSL_1973_33_a2