FERRANDIS, P.; MARTINEZ-SANCHEZ, J. J.; AGUDO, A.; CANO, A. L.; GALLAR, J. J.; HERRANZ, J. M. Presence of Cistus species (Cistaceae) in the soil seed bank of a grassland in the raña of Cabañeros National Park. Forest Systems, v. 8, n. 2, p. 361-376, 1 Dec. 1999.