1) Bethony, Brooker, Albonico, Geiger, Loukas, Diemert and Hotez, (2006) Soil-transmitted helminth infections: ascariasis, trichuriasis, and hookworm, Lancet 367:1521–1532.
2) Ibid.
3) Ibid.
4) Ibid.
5) Hotez PJ, Bethony J, Bottazzi ME, Brooker S, Buss P (March 2005). "Hookworm: "the great infection of mankind"". PLoS Med. 2 (3): e67. 
6) Hawdon JM, Hotez PJ (October 1996). "Hookworm: developmental biology of the infectious process". Curr. Opin. Genet. Dev. 6 (5): 618–23
7) Pal D, Chattopadhyay UK, Sengupta G (April 2007). "A study on the prevalence of hookworm infection in four districts of West Bengal and its linkage with anaemia". Indian J Pathol Microbiol 50 (2): 449–52.
8) Gandhi NS, Jizhang C, Khoshnood K, et al. (August 2001). "Epidemiology of Necator americanus hookworm infections in Xiulongkan Village, Hainan Province, China: high prevalence and intensity among middle-aged and elderly residents". J. Parasitol. 87 (4): 739–43.
9) Verle P, Kongs A, De NV, et al. (October 2003). "Prevalence of intestinal parasitic infections in northern Vietnam". Trop. Med. Int. Health 8 (10): 961–4.
10) Fleming FM, Brooker S, Geiger SM, et al. (January 2006). "Synergistic associations between hookworm and other helminth species in a rural community in Brazil". Trop. Med. Int. Health 11 (1): 56–64.
11) Mabaso ML, Appleton CC, Hughes JC, Gouws E (April 2004). "Hookworm (Necator americanus) transmission in inland areas of sandy soils in KwaZulu-Natal, South Africa". Trop. Med. Int. Health 9 (4): 471–6.