Epps Jr، C. H.؛ Johnson، D. G.؛ Vaughan، A. L. (1993). "Black Firsts". Journal of the National Medical Association. ج. 85 ع. 10: 777–796. PMC:2568213. PMID:8254696.
Manley، A. F. (1984). "Legislation and Funding for Sickle-Cell Research". The American Journal of Pediatric Hematology/Oncology. ج. 6 ع. 1: 67–71. PMID:6711766.
Epps Jr، C. H.؛ Johnson، D. G.؛ Vaughan، A. L. (1993). "Black Firsts". Journal of the National Medical Association. ج. 85 ع. 10: 777–796. PMC:2568213. PMID:8254696.