Graves PM, Deeks JJ, Demicheli V, Jefferson T (). „Vaccines for preventing cholera: killed whole cell or other subunit vaccines (injected)”. Cochrane Database Syst Rev (8): CD000974. doi:10.1002/14651858.CD000974.pub2. PMID20687062.Mentenanță CS1: Nume multiple: lista autorilor (link)
Sinclair D, Abba K, Zaman K, Qadri F, Graves PM (). „Oral vaccines for preventing cholera”. Cochrane Database Syst Rev (3): CD008603. doi:10.1002/14651858.CD008603.pub2. PMID21412922.Mentenanță CS1: Nume multiple: lista autorilor (link)
Graves PM, Deeks JJ, Demicheli V, Jefferson T (). „Vaccines for preventing cholera: killed whole cell or other subunit vaccines (injected)”. Cochrane Database Syst Rev (8): CD000974. doi:10.1002/14651858.CD000974.pub2. PMID20687062.Mentenanță CS1: Nume multiple: lista autorilor (link)
Sinclair D, Abba K, Zaman K, Qadri F, Graves PM (). „Oral vaccines for preventing cholera”. Cochrane Database Syst Rev (3): CD008603. doi:10.1002/14651858.CD008603.pub2. PMID21412922.Mentenanță CS1: Nume multiple: lista autorilor (link)