@article{CC_2006_35_4_a17,
     author = {Zaczkiewicz, Zbigniew and Marchenko, Vladimir},
     title = {Observability of small solutions of linear differential-algebraic systems with delays},
     journal = {Control and Cybernetics},
     pages = {997--1013},
     year = {2006},
     volume = {35},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CC_2006_35_4_a17/}
}