1. The Propriágeosyncline, a key tectonic element in the continental drift puzzle of the South Atlantic;Allard,1969
2. Brazil-Gabon geologic link supports continental drift;Allard;Science,1969
3. The geology of part of an orogenic belt in western Sierra Leone, West Africa;Allen;Geol. Rundsch.,1969
4. Origem e evolução da plataforma brasileira;Almeida;Dep. Nac. Prod. Min., Div. Geol. Mineral., Bol.,1967
5. Precambrian geology of Northeastern Brazil and Western Africa and the theory of continental drift;Almeida;Nat. Resour. Res.,1968