R Caldeyro-Barcia

Fetal electrocardiogram at term labor obtained with subcutaneous fetal electrodes.

R. Caldeyro-barcia, J. Figueroa-Longo, J. J. Poseiro, 1966, American journal of obstetrics and gynecology.

A simplified method for diagnosis of gestational age in the newborn infant.

R. Caldeyro-barcia, S. Konichezky, S Konichezky, 1978, The Journal of pediatrics.