%0 Journal Article %A Andrzej Rosłanowski %A Saharon Shelah %T Historic forcing for Depth %J Colloquium Mathematicum %D 2001 %P 99-115 %V 89 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm89-1-7/ %R 10.4064/cm89-1-7 %G en %F 10_4064_cm89_1_7