%0 Journal Article %A Donald M. Davis %A Victor P. Snaith %T Massey Products and H (p, q)-Systems. %J Mathematische Zeitschrift %D 1973 %P 1-10 %V 132 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1973__132_171905/ %F MZ_1973__132_171905