@article{10_1007_s10492_013_0015_5,
     author = {Xu, Changjin and Zhang, Qianhong and Liao, Maoxin},
     title = {Existence and global attractivity of positive periodic solutions for a delayed competitive system with the effect of toxic substances and impulses},
     journal = {Applications of Mathematics},
     pages = {309--328},
     publisher = {mathdoc},
     volume = {58},
     number = {3},
     year = {2013},
     doi = {10.1007/s10492-013-0015-5},
     mrnumber = {3066823},
     zbl = {06221233},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10492-013-0015-5/}
}