An acoustic model of the respiratory tract. - V. Paul Harper; Steve S. Kraman; Hans Pasterkamp; George R. Wodicka (IEEE Trans. Biomed. Eng., 2001)

Modeling and measurement of flow effects on tracheal sounds. - V. Paul Harper; Hans Pasterkamp; Hiroshi Kiyokawa; George R. Wodicka (IEEE Trans. Biomed. Eng., 2003)