|
Spain | |
| Maria del Mar Abad-Ortega and Fernando Nieto, Eur. Journ. Mineral. , 1995, 7, pp. 363-367. |
| Angel Ortiz Maellas specimen |
| Gonzalez del Tánago J. (1985) Las Pegmatitas Graníticas de San Pedro, Sistema Central Español. Bol. Soc.Española de Mineralogía, pp.207-2017 |
| Magdalena R, Valero A, Calvo G, Alguacil FJ, Gómez FAL. (2021) Simulation to Recover Niobium and Tantalum from the Tin Slags of the Old Penouta Mine: A Case Study. Minerals. 11(10):1123. https://doi.org/10.3390/min11101123 Alfonso, Pura, Hamid, Sarbast Ahmad, Anticoi, Hernan, Garcia-Valles, Maite, Oliva, Josep, Tomasa, Oriol, López-Moro, Francisco Javier, Bascompta, Marc, Llorens, Teresa, Castro, David, García Polonio, Francisco (2020) Liberation Characteristics of Ta–Sn Ores from Penouta, NW Spain. Minerals, 10 (6) 509 doi:10.3390/min10060509 Hamid, S.A. Anticoi, H. Garcia-Valles, M. Oliva, J. Tomasa, O. López-Moro, F.J. Bascompta, M. Llorens, T. |
| Fuertes-Fuente, M., Martin-Izard, A., Boiron, M.C., and Mangas, J. (2000): Mineralium Deposita 35, 332-345. |
| Fuertes-Fuente, M., & Martin-Izard, A. (2001). The Forcarei Norte and Lalín pegmatite fields, Galicia, Northwest of Spain. Mineral Deposits at the Beginning of the 21st Century, 413. |