Leroy, Jacques L.; George-Aniel, Brigitte (1992). "Volcanism and uranium mineralizations: the concept of source rock and concentration mechanism". Journal of Volcanology and Geothermal Research. 50 (3): 247–272. doi:10.1016/0377-0273(92)90096-V. ISSN0377-0273.
Centro de Informacion Tecnologica (January–December 1989). Informacion Tecnologica (in Spanish). Centro de Informacion Tecnologica. ISSN0716-8756.
Leroy, Jacques L.; George-Aniel, Brigitte (1992). "Volcanism and uranium mineralizations: the concept of source rock and concentration mechanism". Journal of Volcanology and Geothermal Research. 50 (3): 247–272. doi:10.1016/0377-0273(92)90096-V. ISSN0377-0273.