%0 Journal Article %A Zofia Adamowicz %A Leszek Aleksander Kołodziejczyk %A Paweł Zbierski %T An application of a reflection principle %J Fundamenta Mathematicae %D 2003 %P 139-159 %V 180 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm180-2-2/ %R 10.4064/fm180-2-2 %G en %F 10_4064_fm180_2_2