J. M.  Garde, Escala, M. C., and Moraza, M. L., ?Infestation of Arvicola sapidus Miller, 1908 (Rodentia: Arvicolidae) by Polyplax spiniger Burmeister, 1839 (Insecta: Anoplura) in southern Navarra (Spain)?, Research and Reviews in Parasitology, vol. 59, no. 3-4, pp. 113 - 116, 1999.