Development of a piezopolymer pressure sensor for a portable fetal heart rate monitor. - Allan J. Zuckerwar; Robert A. Pretlow; John W. Stoughton; Donald A. Baker (IEEE Trans. Biomed. Eng., 1993)

Dual transmission model and related spectral content of the fetal heart sounds. - Stephen A. Zahorian; Allan J. Zuckerwar; Montri Karnjanadecha (Comput. Methods Programs Biomed., 2012)