Santos, J. C. Monteiro. “The Behaviour of the Avirulent PF Strain of Trypanosoma Cruzi in the Invertebrate Host”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 13, no. 4, Aug. 1971, pp. 279-84, https://www.revistas.usp.br/rimtsp/article/view/199436.