Mansfield, L..S, Niamatali, S., Bhopale, V., Volk, S., Smith, G., Lok, J.B., Genta, R,M., Schad, G.A. (1996)Strongyloides stercoralis: maintenance of exceedingly chronic infections, Am J Trop Med Hyg. , 55(6), pp. 617-24.