Richardson, D. K., Shah, B. L., Frantz, I. D., Bednarek, F., Rubin, L. P., & McCormick, M. C. (1999). Perinatal risk and severity of illness in newborns at 6 neonatal intensive care units.

Richardson, D K., B L. Shah, I D. Frantz, F. Bednarek, L P. Rubin, und M C. McCormick. Perinatal Risk and Severity of Illness in Newborns At 6 Neonatal Intensive Care Units. 1999.

Richardson, D K., et al. Perinatal Risk and Severity of Illness in Newborns At 6 Neonatal Intensive Care Units. 1999.