%0 Journal Article %A Murata, Manabu %T On quadratic Diophantine equations in four variables and orders associated with lattices %J Documenta mathematica %D 2014 %P 247-284 %V 19 %I mathdoc %U http://geodesic.mathdoc.fr/item/DOCMA_2014__19__a37/ %G en %F DOCMA_2014__19__a37