%0 Journal Article %A Z.U. Ahmad %A Mursaleen %T Köthe-Toeplitz Duals of some new Sequence Spaces and Their Matrix Maps %J Publications de l'Institut Mathématique %D 1987 %P 57 %V _N_S_42 %N 56 %I mathdoc %U http://geodesic.mathdoc.fr/item/PIM_1987_N_S_42_56_a7/ %G en %F PIM_1987_N_S_42_56_a7