Karen A Kluge

Spectral Analysis Assessment of Respiratory Sinus Arrhythmia in Normal Infants and Infants Who Subsequently Died of Sudden Infant Death Syndrome

Howard J Hoffman, Adrian J. Wilson, Ronald M Harper, 1988, Pediatric Research.

Development of Heart Rate Variation Over the First 6 Months of Life in Normal Infants

Ronald M Harper, R. Harper, V. L. Schechtman, 1989, Pediatric Research.