TY - JOUR AU - Nikodem Mrożek TI - Some Applications of the Katětov Order on Borel Ideals JO - Bulletin of the Polish Academy of Sciences. Mathematics PY - 2016 SP - 21 EP - 28 VL - 64 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ba8055-6-2016/ DO - 10.4064/ba8055-6-2016 LA - fr ID - 10_4064_ba8055_6_2016 ER -