A Bernstein

Quantitative indices of short- and long-term heart rate variability.

L W Organ, J W Goodwin, P A Hawrylyshyn, 1978, American journal of obstetrics and gynecology.

Fetal preejection period.

L W Organ, L. Organ, P A Hawrylyshyn, 1982, Obstetrics and gynecology.

The pre-ejection period as an antepartum indicator of fetal well-being.

L W Organ, L. Organ, P A Hawrylyshyn, 1980, American journal of obstetrics and gynecology.