TY - JOUR AU - Bachelier, Olivier AU - Mehdi, Driss TI - On some relaxations commonly used in the study of linear systems JO - Kybernetika PY - 2015 SP - 830 EP - 855 VL - 51 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.14736/kyb-2015-5-0830/ DO - 10.14736/kyb-2015-5-0830 LA - en ID - 10_14736_kyb_2015_5_0830 ER -