1. Loureiro, J. J., Macedo, M. E.: Bacia hidrográfica do rio Minho. In: Monografias Hidrológicas dos Principais Cursos de Água de Portugal Continental, Direcção Geral dos Serviços Hidraulicos, Lisboa, pp. 3–27 (in Portuguese) (1986)
2. Araújo, M.F.D., Corredeira, C., Gouveia, A.: Distribution of the rare earth elements in sediments of the Northwestern Iberian Continental Shelf. J. Radioanal. Nucl. Chem. 271, 255–260 (2007)
3. Araújo, M.F., Conceição, A., Barbosa, T., Lopes, M.T., Humanes, M.: Elemental composition of marine sponges from the Berlengas Natural Park, Western Portuguese Coast. X-Ray Spectrom. 32, 428–433 (2003)
4. Gouveia, M.A., Araújo, M.F.D., Dias, J.M.A.: Rare earth element distribution in sediments from the Minho river and estuary (Portugal) - a preliminary study. Chem. Geol. 107, 379–383 (1993)
5. Drago, T., Freitas, M. C., Andrade, C., Fernandes, P., Serina S., Gabriel, S.: Holocene sediments of an estuarine coastal plain: the case of the Minho river (North Portugal). In: Pena dos Reis R., Callapez P., Dinis P. (eds.) 23rd IAS Meeting of Sedimentology Abstracts Book, p. 101. Lisbon, Portugal (2004)