"Boulengerina annulata". Armed Forces Pest Management Board. United States Department of Defense. Archived from the original on 9 January 2012. Retrieved 16 February 2012.
Weinstein, Scott A.; James J. Schmidt; Leonard A. Smith (30 March 1991). "Lethal toxins and cross-neutralization of venoms from the African water cobras, Boulengerina annulata annulata and Boulengerina christyi". Toxicon. 29 (11): 1315–1327. doi:10.1016/0041-0101(91)90118-B. PMID1814007.
Weinstein, Scott A.; James J. Schmidt; Leonard A. Smith (30 March 1991). "Lethal toxins and cross-neutralization of venoms from the African water cobras, Boulengerina annulata annulata and Boulengerina christyi". Toxicon. 29 (11): 1315–1327. doi:10.1016/0041-0101(91)90118-B. PMID1814007.
"Boulengerina annulata". Armed Forces Pest Management Board. United States Department of Defense. Archived from the original on 9 January 2012. Retrieved 16 February 2012.