@article{700409,
     title = {Asymptotic properties of a two-dimensional differential system with delay},
     booktitle = {Proceedings of Equadiff 11},
     series = {GDML\_Books},
     publisher = {Comenius University Press},
     address = {Bratislava},
     year = {2007},
     pages = {171-180},
     url = {http://dml.mathdoc.fr/item/700409}
}

Kalas, Josef. Asymptotic properties of a two-dimensional differential system with delay, dans Proceedings of Equadiff 11, GDML_Books,  (2007), pp. 171-180. http://gdmltest.u-ga.fr/item/700409/