@article{10_4064_am38_1_4,
     author = {Joanna Skonieczna and Urszula Fory\'s},
     title = {Stability switches for some class
 of delayed population models},
     journal = {Applicationes Mathematicae},
     pages = {51--66},
     publisher = {mathdoc},
     volume = {38},
     number = {1},
     year = {2011},
     doi = {10.4064/am38-1-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am38-1-4/}
}