%0 Journal Article %A Bai, Ling %A Wang, Ke %T Optimal impulsive harvest policy for time-dependent logistic equation with periodic coefficients %J Electronic Journal of Differential Equations %D 2003 %V 2003 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a110/ %G en %F EJDE_2003__2003__a110