TY - JOUR AU - Tatsien Li AU - Bopeng Rao TI - Uniqueness theorem for a coupled system of wave equations with incomplete internal observation and application to approximate controllability JO - Comptes Rendus. Mathématique PY - 2022 SP - 729 EP - 737 VL - 360 PB - Académie des sciences, Paris DO - 10.5802/crmath.341 LA - en ID - CRMATH_2022__360_G6_729_0 ER -