%0 Journal Article %A Mariusz SkaƂba %T Linear recurrences as sums of squares %J Acta Arithmetica %D 2012 %P 207-216 %V 155 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa155-2-8/ %R 10.4064/aa155-2-8 %G en %F 10_4064_aa155_2_8