1. Alcindor, L.G., Bereziat, G., Vielh, J.P., Gautray, J.P.: Le rapport de concentration acide palmitique sur acide stearique. Indicateur de la maturite pulmonaire foetale. Clin. Chim. Acta. 50, 31–34 (1974)
2. Archimaut, G., Belizan, J.M., Althabe, O.: Glucose concentration in amniotic fluid: Its possible significance in diabetic pregnancy. Am. J. Obstet. Gynecol. 119, 596–602 (1974)
3. Aubry, R.H., Rourke, J.E., Almanza, R., Cantor, R.M., Doren, J.E. van: The lecithin/ sphingomyelin ratio in a high-risk obstetric population. Obstet. Gynecol. 47, 21–28 (1976)
4. Avery, M.D., Mead. J.: Surface properties in relation to atelectasis and hyaline membrane disease. Am. J. Dis. Child. 91, 517 (1959)
5. Ayrombooi, J., Mann, L.I., Weiss, R.R., Tejani, N.A., Laydar, M.: Modern management of the diabetic pregnancy. Obstet. Gynecol. 49, 137–143 (1977)