TY  - JOUR
AU  - M. J. Alves
AU  - S. M. Labovski
TI  - On the spectral properties and positivity of solutions of a periodic boundary value problem for a second-order functional differential equation
JO  - Vestnik rossijskih universitetov. Matematika
PY  - 2020
SP  - 123
EP  - 130
VL  - 25
IS  - 130
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VTAMU_2020_25_130_a1/
LA  - ru
ID  - VTAMU_2020_25_130_a1
ER  -