%0 Journal Article %A Bjorn Poonen %T Some diophantine equations of the form $x^n + y^n = z^m$ %J Acta Arithmetica %D 1998 %P 193-205 %V 86 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-86-3-193-205/ %R 10.4064/aa-86-3-193-205 %G en %F 10_4064_aa_86_3_193_205