Johnson ED، Gonzalez JP، Georges A (1993). "Filovirus activity among selected ethnic groups inhabiting the tropical forest of equatorial Africa". Transactions of the Royal Society of Tropical Medicine and Hygiene. ج. 87 ع. 5: 536–538. DOI:10.1016/0035-9203(93)90077-4. PMID:8266403.
Johnson ED، Gonzalez JP، Georges A (1993). "Filovirus activity among selected ethnic groups inhabiting the tropical forest of equatorial Africa". Transactions of the Royal Society of Tropical Medicine and Hygiene. ج. 87 ع. 5: 536–538. DOI:10.1016/0035-9203(93)90077-4. PMID:8266403.