1. Considerations in evaluating changes in outcome for infants weighing less than 1,501 grams;Knobloch;Pediatrics,1982
2. Outlook for the low birthweight baby — then and now;Davies;Arch Dis Child,1976
3. The low-birth-weight infant: Evolution of a changing outlook;Hack;N Engl J Med,1979
4. Morbidity and mortality in infants with birth weights between 501 and 1,000 grams;Horgan;J Perinatol,1986
5. Collaborative study of very low birth infants. Am J Dis Child;Kitchen,1983