@article{DMDICO_2013_33_2_a5,
     author = {Loi, Nguyen},
     title = {On periodic oscillations for a class of feedback control systems in {Hilbert} spaces},
     journal = {Discussiones Mathematicae. Differential Inclusions, Control and Optimization},
     pages = {205--219},
     publisher = {mathdoc},
     volume = {33},
     number = {2},
     year = {2013},
     zbl = {1300.34148},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMDICO_2013_33_2_a5/}
}