%0 Journal Article %A Franz Lemmermeyer %T Some families of non-congruent numbers %J Acta Arithmetica %D 2003 %P 15-36 %V 110 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa110-1-2/ %R 10.4064/aa110-1-2 %G en %F 10_4064_aa110_1_2