Chiroles RubalcabaS., González GonzálezM.I., Torres RojasT., Valdés ÁguilaM. and Domínguez MartínezI. 2003. Evaluation of microbiological indicators of fecal contamination in waters of recreational use. Cub@: Medio Ambiente y Desarrollo. 3, 4 (Jan. 2003).