TY - JOUR AU - L. I. Kononenko TI - Infinitesimal analysis of singular systems with fast and slow variables JO - Sibirskij žurnal industrialʹnoj matematiki PY - 2003 SP - 51 EP - 59 VL - 6 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SJIM_2003_6_4_a3/ LA - ru ID - SJIM_2003_6_4_a3 ER -