2005 · Francisco Célio Maia Chaves, S. E. L. da Silva, et al. · Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) · 1
2006 · A. das G. C. de Souza, S. E. L. da Silva, et al. · Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT)
1996 · A. das G. C. de Souza, S. E. L. da Silva, et al. · Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT)
1995 · S. E. L. da Silva, A. das G. C. de Souza, et al. · Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT)