Recursive parameter identification of constrained systems: an application to electrically stimulated muscle. - Tien Li Chia; Po-Chuan Chow; Howard Jay Chizeck (IEEE Trans. Biomed. Eng., 1991)

Kalman Filtering with Statistical State Constraints. - Tien Li Chia; Daniel J. Simon; Howard Jay Chizeck (Control. Intell. Syst., 2006)