%0 Journal Article %A Ayşe Alaca %A Şaban Alaca %A Faruk Uygul %A Kenneth S. Williams %T Representations by sextenary quadratic forms whose coefficients are 1, 2 and 4 %J Acta Arithmetica %D 2010 %P 289-309 %V 141 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa141-3-4/ %R 10.4064/aa141-3-4 %G en %F 10_4064_aa141_3_4