%0 Journal Article %A Horacio Porta %T Factorable and strictly singular operators in a product space %J Studia Mathematica %D 1970 %P 237-243 %V 37 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-37-3-237-243/ %R 10.4064/sm-37-3-237-243 %G en %F 10_4064_sm_37_3_237_243