TY - JOUR AU - Jan Waszkiewicz TI - Not that way! JO - Mathematica Applicanda PY - 2012 SP - 118 EP - 128 VL - 40 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.14708/ma.v40i2.387/ DO - 10.14708/ma.v40i2.387 LA - pl ID - 10_14708_ma_v40i2_387 ER -