%0 Journal Article %A Kazuyuki Hatada %T On the rationality of periods of primitive forms %J Acta Arithmetica %D 1981 %P 9-40 %V 40 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-40-1-9-40/ %R 10.4064/aa-40-1-9-40 %G en %F 10_4064_aa_40_1_9_40