@article{EJDE_2014__2014__a91,
     author = {Xiao, Huafeng and Guo, Zhiming},
     title = {Multiplicity and minimality of periodic solutions to delay differential system},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2014},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2014__2014__a91/}
}