1. Considerçoes sobre a idade do Grupo Barreiras no Nordeste do estado do Para;Arai,1988
2. Ihering's hypothesis in the light of foraminiferological data;Bolthovskoy;Lethaia,1991
3. Presente y futuro de la exploracíon petrolera en las cuencas subandinas de Colombia. Ecopetrol;Bueno,1988
4. Carbonate and siliciclastic shelf geometry in response to changes in relative sea level in the Guyana Basin;Campbell,1992
5. Solimoes megashear: Intraplate tectonics in northwestern Brazil;Caputo;Geology,1991