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| Della Ventura, Giancarlo, Williams, C. Terry, Cabella, Roberto, Oberti, Roberta, Caprilli, Enrico, Bellatreccia, Fabio (1999) Britholite-hellandite intergrowths and associated REE-minerals from the alkali-syenitic ejecta of the Vico volcanic complex (Latium, Italy): petrological implications bearing on REE mobility in volcanic systems. European Journal of Mineralogy, 11 (5) 843-854 doi:10.1127/ejm/11/5/0843
Oberti, R., Ottolini, L., Cámara, F., Della Ventura, G. (1999) Crystal structure of non-metamict Th-rich hellandite-(Ce) from Latium (Italy) and crystal chemistry of the hellandite-group minerals. American Mineralogist, 84, 913–921 |
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| Pierini, G. (2004): Homilite in un proietto vulcanico a Tre Croci di Vetralla (VT). Micro (notizie mineralogiche), 2004, 5-12
American Mineralogist, Volume 91, pages 1170-1177, 2006 |
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| Cámara,F., Williams,C.T., Della Ventura,G., Oberto,R. & Caprilli,E. (2004): Non-metamict betafite from Le Carcarelle (Vico volcanic complex, Italy): occurrence and crystal structure, Mineralogical Magazine, 68, 939-950. |
Tre Croci, Vetralla, Viterbo Province, Lazio, Italy