TY - JOUR AU - Farid Ammar-Khodja AU - Giuseppe Geymonat AU - Arnaud Münch TI - On the exact controllability of a system of mixed order with essential spectrum JO - Comptes Rendus. Mathématique PY - 2008 SP - 629 EP - 634 VL - 346 IS - 11-12 PB - Elsevier DO - 10.1016/j.crma.2008.04.009 LA - en ID - CRMATH_2008__346_11-12_629_0 ER -