TY  - JOUR
AU  - E. I. Bravyi
TI  - On positive periodic solutions of first order functional differential equations
JO  - Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta
PY  - 2015
SP  - 21
EP  - 28
IS  - 2
UR  - http://geodesic.mathdoc.fr/item/IIMI_2015_2_a2/
LA  - ru
ID  - IIMI_2015_2_a2
ER  -