Lasiecka, I., Triggiani, R., & Yao, P. F. Exact controllability for second-order hyperbolic equations with variable coefficient-principal part and first-order terms.

Lasiecka, I., R. Triggiani, و P. F. Yao. Exact Controllability for Second-order Hyperbolic Equations With Variable Coefficient-principal Part and First-order Terms.

Lasiecka, I., R. Triggiani, و P. F. Yao. Exact Controllability for Second-order Hyperbolic Equations With Variable Coefficient-principal Part and First-order Terms.