Hernández, Francisco, Ana Patricia Argüello, Patricia Rivera, and Ernesto Jiménez. “<i>Balantídium coli</i≫ (Vestibuliferida: Balantidiidae): The Persistence of an Old Problem”. Revista de Biología Tropical 41, no. 1 (April 1, 1993): 149–151. Accessed July 6, 2024. https://revistas.ucr.ac.cr/index.php/rbt/article/view/23323.