TY - JOUR AU - Korec, Ivan TI - The $3x+1$ problem, generalized Pascal triangles and cellular automata JO - Mathematica slovaca PY - 1992 SP - 547 EP - 563 VL - 42 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MASLO_1992__42_5_a2/ LA - en ID - MASLO_1992__42_5_a2 ER -