@article{MM3_2019_23_2_a1,
     author = {Abdelouaheb Ardjouni and Ahcene Djoudi},
     title = {Existence of positive periodic solutions for third-order nonlinear delay differential equations with variable coefficients},
     journal = {Mathematica Moravica},
     pages = {17 - 28},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {2019},
     url = {https://geodesic-test.mathdoc.fr/item/MM3_2019_23_2_a1/}
}