C. Beltrán, L. Vargas, and P. Quijón, “Infestation of Polydora rickettsi (Polychaeta: Spionidae) in shells of Crepidula fecunda (Mollusca: Calyptraeidae) in relation to intertidal exposure at Yaldad Bay, Chiloe, Chile”, Sci. mar., vol. 69, no. 1, pp. 99–103, Mar. 2005.