@article{10_14712_1213_7243_015_103,
     author = {Soulahia, Imene and Ardjouni, Abdelouaheb and Djoudi, Ahcene},
     title = {Existence of nonnegative periodic solutions in neutral integro-differential equations with functional delay},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {23--44},
     publisher = {mathdoc},
     volume = {56},
     number = {1},
     year = {2015},
     doi = {10.14712/1213-7243.015.103},
     mrnumber = {3311575},
     zbl = {06433803},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.14712/1213-7243.015.103/}
}