Katz, Naftale, et al. “Re-Infection of Patients in Schistosomiasis Mansoni Endemic Areas After Specific Treatment. II - Lnfluence of BCG Vaccination”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 20, no. 4, Aug. 1978, pp. 227-, https://www.revistas.usp.br/rimtsp/article/view/197708.