The critically ill premature infant with patent ductus arteriosus and pulmonary disease—an echocardiographic assessmentRichard E. Behrman, Joan Korfhagen, Warren E. Ringenburg et al.|The Journal of Pediatrics|1975Cited by 72
Left ventricular performance in the critically ill premature infant with patent ductus arteriosus and pulmonary disease.Barry G. Baylen, Samuel Kaplan, Richard A. Meyer et al.|Circulation|1977Cited by 71