TY - JOUR AU - Allan Sieradski TI - Non-uniqueness of homotopy factorizations into irreducible polyhedra JO - Fundamenta Mathematicae PY - 1971 SP - 97 EP - 99 VL - 72 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-72-2-97-99/ DO - 10.4064/fm-72-2-97-99 LA - en ID - 10_4064_fm_72_2_97_99 ER -