%0 Journal Article %A Duval, Art M. %T On $f$-vectors and relative homology %J Journal of Algebraic Combinatorics %D 1999 %P 215-232 %V 9 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/JAC_1999__9_3_a5/ %G en %F JAC_1999__9_3_a5