Invertibility of Quantum-Mechanical Control Systems. - C. K. Ong; Garng C. Huang; Tzyh Jong Tarn; John W. Clark (Math. Syst. Theory, 1984)

Quantum Nondemolition Filters. - John W. Clark; C. K. Ong; Tzyh Jong Tarn; Garng C. Huang (Math. Syst. Theory, 1985)