G. Paz-Bermúdez, R. Carballal, J. Marques, and M. E. López de Silanes, “Catalogue of saxicolous lichens (Ascomycota) of the archaeological area of Siega Verde (Salamanca, Spain)”, An. Jard. Bot. Madr., vol. 75, no. 2, p. e076, Dec. 2018.