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Gonçalves H, Rocha AP, Ayres-de-Campos D., Bernardes J. Linear and nonlinear fetal heart rate analysis of normal and acidemic fetuses in the minutes preceding delivery. {MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING}. 2006;{44}:{847-855}.Edit

Gonçalves H, Bernardes J, Rocha AP, Ayres-de-Campos D.. Linear and nonlinear analysis of heart rate patterns associated with fetal behavioral states in the antepartum period. {EARLY HUMAN DEVELOPMENT}. 2007;{83}:{585-591}.Edit

Gonçalves H, Rocha AP, Ayres-de-Campos D., Bernardes J. Frequency domain and entropy analysis of fetal heart rate: Appealing tools for fetal surveillance and pharmacodynamic assessment of drugs. {Cardiovascular and Hematological Disorders - Drug Targets}. 2008;{8}:{91-98}.Edit

Bernardes J, Gonçalves H, Ayres-de-Campos D., Rocha AP. Linear and complex heart rate dynamics vary with sex in relation to fetal behavioural states. {EARLY HUMAN DEVELOPMENT}. 2008;{84}:{433-439}.Edit

Bernardes J, Gonçalves H, Ayres-de-Campos D., Rocha AP. Sex differences in linear and complex fetal heart rate dynamics of normal and acidemic fetuses in the minutes preceding delivery. {JOURNAL OF PERINATAL MEDICINE}. 2009;{37}:{168-176}.Edit

Gonçalves H, Costa A., Ayres-de-Campos D., Costa-Santos C., Rocha AP, Bernardes J. Comparison of real beat-to-beat signals with commercially available 4 Hz sampling on the evaluation of foetal heart rate variability. {MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING}. 2013;{51}:{665-676}.Edit