%0 Journal Article %A Tang, Mei-Lan %A Liu, Xin-Ge %T Positive periodic solution for ratio-dependent $n$-species discrete time system %J Applications of Mathematics %D 2011 %P 577-589 %V 56 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1007/s10492-011-0034-z/ %R 10.1007/s10492-011-0034-z %G en %F 10_1007_s10492_011_0034_z