TY - JOUR AU - Kinga Stolot TI - Coproducts and the additivity of the Szymczak index JO - Annales Polonici Mathematici PY - 2005 SP - 211 EP - 226 VL - 85 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap85-3-2/ DO - 10.4064/ap85-3-2 LA - en ID - 10_4064_ap85_3_2 ER -