TY - JOUR AU - S. M. Ulam TI - On some statistical properties of dynamical systems JO - Matematika PY - 1963 SP - 137 EP - 142 VL - 7 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MAT_1963_7_5_a6/ LA - ru ID - MAT_1963_7_5_a6 ER -