@article{EJDE_2006__2006__a162,
     author = {Hbid,  My Lhassan and Qesmi,  Redouane},
     title = {Periodic solutions for functional differential equations with periodic delay close to zero},
     journal = {Electronic journal of differential equations},
     year = {2006},
     volume = {2006},
     zbl = {1118.34056},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2006__2006__a162/}
}