1. Li, T. T., Controllability and Observabilty for Quasilinear Hyperbolic Systems, AIMS Series on Applied Mathematics, Vol. 3, American Institute of Mathematical Sciences & Higher Education Press, Springfield, Beijing, 2010.
2. Li, T. T. and Rao, B. P., Local exact boundary controllability for a class of quasilinear hyperbolic systems, Chin. Ann. Math., 23B(2), 2002, 209–218.
3. Li, T. T. and Rao, B. P., Exact boundary controllability for quasilinear hyperbolic systems, SIAM J. Control Optim., 41, 2003, 1748–1755.
4. Li, T. T. and Rao, B. P., Strong (Weak) exact controllability and strong (weak) exact observability for quasilinear hyperbolic systems, Chin. Ann. Math., 31B(5), 2010, 723–742.
5. Li, T. T. and Yu, L. X., Exact controllability for first order quasilinear hyperbolic systems with zero eigenvalues, Chin. Ann. Math., 24B(4), 2003, 415–422.