Ultrastructural localization of Sm15 and Sm25, two major tegumental adult worm antigens of Schistosoma mansoniF.G.C. Abath, E.M.A. Hirst, P. Hagan and A.J.G. SimpsonParasite, 6 3 (1999) 243-247DOI: https://doi.org/10.1051/parasite/1999063243