TY - JOUR AU - I. N. Sergeev TI - A formula for the minimal exponent of a three-dimensional system JO - Differencialʹnye uravneniâ PY - 2000 SP - 345 EP - 354 VL - 36 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_2000_36_3_a5/ LA - ru ID - DE_2000_36_3_a5 ER -