TY - JOUR AU - Bruno Benedetti AU - Frank H. Lutz TI - Knots in collapsible and non-collapsible balls JO - The electronic journal of combinatorics PY - 2013 VL - 20 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.37236/3319/ DO - 10.37236/3319 ID - 10_37236_3319 ER -