%0 Journal Article %A Fujiwara, Yuichiro %T Nonexistence of sparse triple systems over abelian groups and involutions %J Journal of Algebraic Combinatorics %D 2007 %P 495-506 %V 26 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/JAC_2007__26_4_a2/ %G en %F JAC_2007__26_4_a2