%0 Journal Article %A Teresa Bigorajska %A Henryk Kotlarski %A James H. Schmerl %T On regular interstices and selective types in countable arithmetically saturated models of Peano Arithmetic %J Fundamenta Mathematicae %D 1998 %P 125-146 %V 158 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-158-2-125-146/ %R 10.4064/fm-158-2-125-146 %G en %F 10_4064_fm_158_2_125_146