1. Fetal deceleration index: Its relationship with fetal pH, Apgar score, and dips or decelerations;Acien;J Perinat Med,1979
2. Chemoreceptor and baroreceptor function with respect to fetal heart rate variability;Acker,1985
3. Antepartum fetal testing: evaluation and redefinition of criteria for clinical interpretation;Aladjem;Semin Perinatol,1981
4. Inconsistencies in classification by experts of cardiotocograms and subsequent clinical decision;Ayres de Campos;Br J Obstet Gynaecol,1999
5. Fetal acceleration test;Bishop;Am J Obstet Gynecol,1981