TY  - JOUR
TI  - ``Pontryagin Readings-XV'' at Voronezh spring mathematical school ``Modern methods in qualitative theory of boundary value problems''
JO  - Differencialʹnye uravneniâ
PY  - 2004
SP  - 1579
EP  - 1580
VL  - 40
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_2004_40_11_a17/
LA  - ru
ID  - DE_2004_40_11_a17
ER  -