Arias, Ma Laura, Rafael Monge, Florencia Antillón, and Eduardo Glenn. 1994. “Occurrence of the Bacteria <i>Listeria</i> Spp. In Raw Milk in Costa Rica”. Revista De Biología Tropical 42 (3):711–713. https://revistas.ucr.ac.cr/index.php/rbt/article/view/23276.