Yasuo Yumoto

Noninvasive measurement of isovolumetric contraction time during hypoxemia and acidemia: Fetal lamb validation as an index of cardiac contractility.

Tsuyoshi Koga, Naoko Kinukawa, Yasuyuki Fujita, 2005, Early human development.

Noninvasive measurement of isovolumetric contraction time by Doppler cardiography can be substituted for fetal cardiac contractility: evaluation of a fetal lamb study.

Naoko Kinukawa, Yasuyuki Fujita, N. Kinukawa, 2007, Early human development.