G. Catarinella Arrea, M. Chinchilla Carmona, O. M. Guerrero Bermúdez, and E. Abrahams, “Effect of <i>Trypanosoma lewisi</i> (Kinetoplastida: Trypanosomatidae) on the infection of white rats with <i>Toxoplasma gondii</i> (Eucoccidia: Sarcocystidae) oocysts”, Rev. Biol. Trop., vol. 46, no. 4, pp. 1121–1123, Dec. 1998.