%0 Journal Article %A Girstmair, Kurt %T Periodic continued fractions and Kronecker symbols %J Journal of integer sequences %D 2015 %V 18 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/JIS_2015__18_9_a0/ %G en %F JIS_2015__18_9_a0