A. D. Flores Carrero, Z. Peña Contreras, D. Dávila Vera, M. Colmenares Sulbarán, and R. V. Mendoza Briceño, “Blastocystis sp. in Drinking Water at a Rural School in Merida, Venezuela”, Kasmera, vol. 39, no. 2, pp. 123-129, Feb. 2011.