TY  - JOUR
AU  - Weijiu Liu
AU  - Graham Williams
TI  - Exact Neumann boundary controllability for second order hyperbolic equations
JO  - Colloquium Mathematicum
PY  - 1998
SP  - 117
EP  - 142
VL  - 76
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-76-1-117-142/
DO  - 10.4064/cm-76-1-117-142
LA  - en
ID  - 10_4064_cm_76_1_117_142
ER  -