Guerrero, O. M., Chinchilla, M., Castro, A., & Abrahams, E. (1995). Age influence in the natural resistance of white rat and mice to the protozoan <i>Toxoplasma gondii</i>. Revista De Biología Tropical, 43(1-3), 27–30. Retrieved from https://revistas.ucr.ac.cr/index.php/rbt/article/view/22413