s model and the transmission of bilharzia, Trans R Soc Trop Med Hyg, vol.78, issue.1, pp.6-15, 1978. ,
The dynamics of helminth infections, with special reference to schistosomes, Transactions of the Royal Society of Tropical Medicine and Hygiene, vol.59, issue.5, pp.489-506, 1965. ,
DOI : 10.1016/0035-9203(65)90152-5
Reproduction numbers and sub-threshold endemic equilibria for compartmental models of disease transmission, Mathematical Biosciences, vol.180, issue.1-2, pp.29-48, 2002. ,
DOI : 10.1016/S0025-5564(02)00108-6
« On the definition and the computation of the basic reproduction ratio R0 in models for infectious diseases in heterogeneous populations, pp.365-382, 1990. ,
« Computation of threshold conditions for epidemiological models and global stability of the disease free equilibrium, Math. Biosci, vol.213, issue.0 1, pp.1-12, 2008. ,
Human schistosomiasis, Lancet, vol.368, pp.9541-1106, 2006. ,