An acoustical guidance and position monitoring system for endotracheal tubes. - Jeffrey P. Mansfield; Robert P. Lyle; William D. Voorhees; George R. Wodicka (IEEE Trans. Biomed. Eng., 1993)

Miniature acoustic guidance system for endotracheal tubes. - Eduardo J. Juan; Jeffrey P. Mansfield; George R. Wodicka (IEEE Trans. Biomed. Eng., 2002)

Detection of respiratory sounds at the external ear. - Gary A. Pressler; Jeffrey P. Mansfield; Hans Pasterkamp; George R. Wodicka (IEEE Trans. Biomed. Eng., 2004)