1. Uraniferous phosphorite and apatite-bearing gneisses in the Proterozoic of Finland;Äikäs,1980
2. Brazil-Gabon geologic link supports continental drift;Allard;Science,1969
3. Phosphoro-uraniferous mineralization associated to sodium episyenites in the Ceará Pre-cambrian (Brazil);Angeiras,1981
4. The geology of espinharas uranium deposit, Brazil;Ballhorn,1978
5. The Okaki-Broadlands hydrothermal area. New Zealand: Mineralogy and related geochemistry;Browne;Am. J. Sci.,1970