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Italy | |
| VIGNOLA, P., & DIELLA, V. (2007). Phosphates from Piona granitic pegmatites (Central Southern Alps, Italy). Granitic Pegmatites: the State of the Art. Book of Abstr.(T. Martins & R. Vieira, eds.). Universidade do Porto, Departamento de Geologia, Memórias, 8, 102-103. |
| Vignola P., Fransolet A.-M., Guastoni A., Appiani R. (2011): Le pegmatiti di Piona. Recenti studi sui filoni Malpensata, Luna e Sommafiume. Riv. Mineral. Ital., 35, 1, 30-38. |
| Vignola P., Diella V., Ferrari E.S., Fransolet A.-M. (2011): Complex mechanisms of alteration in a graftonite + sacropside+ triphylite association from the Luna pegmatite, Piona, Lecco Province, Italy. Can. Mineral., 49, 765-776. |
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Switzerland | |
| Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 196, 350. |