@article{10_4064_ap102_3_1,
     author = {Zhonghuai Wu and Jianying Shao and Mingquan Yang and Wei Gao},
     title = {Permanence and global exponential stability of {Nicholson-type} delay systems},
     journal = {Annales Polonici Mathematici},
     pages = {205--211},
     publisher = {mathdoc},
     volume = {102},
     number = {3},
     year = {2011},
     doi = {10.4064/ap102-3-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap102-3-1/}
}