TY  - JOUR
AU  - Abdelouaheb Ardjouni
AU  - Ahcene Djoudi
TI  - Existence of positive periodic solutions for third-order nonlinear delay differential equations with variable coefficients
JO  - Mathematica Moravica
PY  - 2019
SP  - 17 
EP  -  28
VL  - 23
IS  - 2
PB  - mathdoc
UR  - https://geodesic-test.mathdoc.fr/item/MM3_2019_23_2_a1/
ID  - MM3_2019_23_2_a1
ER  -