%0 Journal Article %A Li, Tatsien %A Rao, Bopeng %T Kalman's criterion on the uniqueness of continuation for the nilpotent system of wave equations %J Comptes Rendus. Mathématique %D 2018 %P 1188-1194 %V 356 %N 11-12 %I Elsevier %U http://archive.numdam.org/articles/10.1016/j.crma.2018.09.006/ %R 10.1016/j.crma.2018.09.006 %G en %F CRMATH_2018__356_11-12_1188_0