%0 Journal Article %A Yuri Bilu %T Quadratic factors of f(x) -g(y) %J Acta Arithmetica %D 1999 %P 341-355 %V 90 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-90-4-341-355/ %R 10.4064/aa-90-4-341-355 %G en %F 10_4064_aa_90_4_341_355