@article{CC_2004_33_4_a3,
     author = {Mitkowski, Wojciech},
     title = {Analysis of undamped second order systems with dynamic feedback},
     journal = {Control and Cybernetics},
     pages = {563--572},
     year = {2004},
     volume = {33},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CC_2004_33_4_a3/}
}