1. Geologia e geomorfologia do Quaternário Costeiro do Estado do Rio Grande do Norte;Barreto;Geologia USP Série Científica, São Paulo,2004
2. Late Quaternary vegetational and climate dynamics in northeastern Brazil, inferences from marine core GeoB 3104–1;Behling;Quaternary Science Reviews,2000
3. Bétard, F., 2007. Montagnes humides au cœur du Nordeste brésilien semi-aride: le cas du massif de Baturité (Ceará). Apports d'une approche morphopédologique pour la connaissance et la gestion des milieux. Ph.D. thesis (unpublished), Paris-Sorbonne University, France.
4. Laterite preservation and soil distribution in the Araripe-Campos Sales area: consequences of uplift, erosion and climatic change;Bétard,2005
5. Illite neoformation in plagioclase during weathering: evidence from semi-arid Northeast Brazil;Bétard;Geoderma,2009