%0 Journal Article %A Wolfgang Schmidt %T Northcott's theorem on heights II. The quadratic case %J Acta Arithmetica %D 1995 %P 343-375 %V 70 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-70-4-343-375/ %R 10.4064/aa-70-4-343-375 %G en %F 10_4064_aa_70_4_343_375