%0 Journal Article %A R. Cook %T Simultaneous quadratic inequalities %J Acta Arithmetica %D 1973 %P 337-346 %V 25 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-25-4-337-346/ %R 10.4064/aa-25-4-337-346 %G en %F 10_4064_aa_25_4_337_346