Assessment of closed-loop ventilatory stability in obstructive sleep apnea. - Musa H. Asyali; Richard B. Berry; Michael C. K. Khoo (IEEE Trans. Biomed. Eng., 2002)

Determining a continuous marker for sleep depth. - Musa H. Asyali; Richard B. Berry; Michael C. K. Khoo; Ayse Altinok (Comput. Biol. Medicine, 2007)