@article{10_14736_kyb_2015_5_0830,
     author = {Bachelier, Olivier and Mehdi, Driss},
     title = {On some relaxations commonly used in the study of linear systems},
     journal = {Kybernetika},
     pages = {830--855},
     publisher = {mathdoc},
     volume = {51},
     number = {5},
     year = {2015},
     doi = {10.14736/kyb-2015-5-0830},
     mrnumber = {3445987},
     zbl = {06537783},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.14736/kyb-2015-5-0830/}
}