%0 Journal Article
%A S. S. Ryshkov
%T On perfect form $A_n^k$: existence of lattices with non-fundamental simplex of division; existence of perfect forms, which are not reducible in the sense of Minkowski to a form with coefficients
%J Zapiski Nauchnykh Seminarov POMI
%D 1973
%P 65-71
%V 33
%U http://geodesic.mathdoc.fr/item/ZNSL_1973_33_a3/
%G ru
%F ZNSL_1973_33_a3