TY - JOUR AU - L. V. Ovsyannikov TI - On the property of $x$-autonomy JO - Doklady Akademii Nauk PY - 1993 SP - 559 EP - 561 VL - 330 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1993_330_5_a7/ LA - ru ID - DAN_1993_330_5_a7 ER -