1. Alvarez, H., De Bejar, R. and Aladjem, S.: La placenta human Aspectos morfologicos y fisio-patologicos. In, 4th Uruguayan Congress for Obstetrics and Gynecology, Vol. 1, pp. 190–261, 1964.
2. Alvarez, H., Morel, R.L., Benedetti, W.L. and Scavarelli, M.: Trophoblast hyperplasia and maternal arterial pressure at term. Am. J. Obstet. Gynecol. 105: 1015–1021, 1969.
3. Alvarez, H., Benedetti, W.L., Morel, R.L. and Scavarelli, M.: Trophoblast development gradient and its relationship to placental hemodynamics. Am. J. Obstet. Gynecol. 106: 416–420, 1970.
4. Amaladoss, A.S.P. and Burton, G.J.: Organ culture of human placental villi in hypoxic and hyperoxic conditions: a morphometric study. J. Dev. Physiol. (Oxf.) 7: 113–118, 1985.
5. Bacon, B.J., Gilbert, R.D., Kaufmann, P., Smith A.D., Trevino, F.T. and Longo, L.D.: Placental anatomy and diffusing capacity in guinea pigs following long-term maternal hypoxia. Placenta 5: 475–488, 1984.