| Cepedal, A., Martin-Izard, A., & Fuertes-Fuente, M. (2004) Ag and Bi-bearing sulphides, tellurides and selenides, El Valle-Boinás Cu-Au skarn, Asturias, Spain. Extended Abstracts, IGCP-486, Alba Iulia, Romanía, pp 219-221. European Journal of Mineralogy 15(6):1069-1077 ( 2003) |