TY - JOUR TI - Seminar on qualitative theory of differential equations at Moscow State University JO - Differencialʹnye uravneniâ PY - 2000 SP - 1570 EP - 1579 VL - 36 IS - 11 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_2000_36_11_a20/ LA - ru ID - DE_2000_36_11_a20 ER -