@article{CMJ_2003__53_3_a5,
     author = {Fang, Hui},
     title = {Positive periodic solutions of $N$-species neutral delay systems},
     journal = {Czechoslovak Mathematical Journal},
     pages = {561--570},
     publisher = {mathdoc},
     volume = {53},
     number = {3},
     year = {2003},
     mrnumber = {2000053},
     zbl = {1080.34530},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2003__53_3_a5/}
}