Krueger, Charlene A longitudinal description of heart rate variability in 28--34-week-old preterm infants. [electronic resource] - Biological research for nursing Jan 2010 - 261-8 p. digital Publication Type: Journal Article ISSN: 1552-4175 Standard No.: 10.1177/1099800409341175 doi Subjects--Topical Terms: ElectrocardiographyFemaleHeart RateHumansInfant, NewbornInfant, PrematureLongitudinal StudiesMale